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As stigma around the countrys health crisis starts to fade, some care facilities are at the forefront of devising ways to support a super-ageing society

For the millions of Japanese people living with dementia, diagnosis is often the beginning of a journey into a life of seclusion.

When dementia is covered by the media, it is in the form of news about experimental therapies, or reports on the latest police campaign to encourage older people to surrender their driving licences.

The voices of people living with the condition in ever rising numbers among an ageing population are often missing from the public debate.

About 5 million Japanese people have Alzheimers or other forms of dementia

About 5 million Japanese people live with Alzheimers and other forms of dementia, and 7.3 million or one in five people aged 65 or over will be affected by 2025, according to government estimates. Most live at home, cared for by relatives, 40% of whom warned they could not continue as caregivers due to stress and the impact on household finances, according to a 2015 survey.

There are signs of change, however. The city of Matsudo, east of Tokyo, won recognition at home and abroad for its groundbreaking approach to dementia several years before the national government released its orange plan a 22.5bn yen (160m) programme to hire more specialists, improve early diagnosis and expand community-based care in 2015.

Matsudo made dementia a public health priority almost a decade ago, raising awareness of the condition among residents as well as businesses that regularly come into contact with older people. Several times a month, volunteer dementia supporters wearing bright orange bibs patrol neighbourhoods to distribute leaflets with information about dementia services and, occasionally, to help people in distress.

Activities at this care home include exercise sessions, games and music therapy

In the Sapporo and Eniwa areas of Hokkaido, Japans northernmost island, the Megumi-no-ie and Komorebi-no-ie group homes cater for a total of 36 people with dementia.

Here, food and general care are provided, but residents are also encouraged to take a leading role in their daily routines, whether it be gardening, preparing meals, food shopping or cleaning. Some sell vegetables they have grown to give them a sense of financial independence.

Fumiko Ito, 69, ran a restaurant-bar with her husband for three decades. Ito, a resident of the care home in Eniwa, recalls that her husband, who died seven years ago, was married when they met. I met him at my friends bar. I was drinking there and so was he He was sitting behind me and he pushed me from behind and said: Hi. It was love at first sight. I was 18 or 19. He was 10 years older than me.

It is predicted that one in five people aged 65 or over will be affected by dementia by 2025

I often think about him and often dream about us together he died from cancer, Ito says. He had a really difficult time coping with that. I sometimes think about that.

Asked what makes her worry, she replies: My health. I hope to stay fit for a long time I hope to stay here with my friends and have a happy life here. And what makes her happy? I like food. Im happiest when Im sharing good food with friends.

Itos fellow resident, 89 year-old Masanori Nohara, says he can be forgetful, but claims he doesnt give a damn about the state of his health. I sometimes forget things, he says. I know about dementia, but I dont think I have it. He recalls the joy he felt when he qualified as a joiner in his early 20s. I became an apprentice when I was 18 and trained for four years. I was really happy when I qualified, he says.

Being able to use the skills he learned as a young man can be a source of comfort. I feel like Im getting old when Im tired but if Im still working I dont feel like that. I can still work and I still have my tools, so if possible I still want to work as a joiner.

I feel happy when Im sharpening knives, because thats what I used to do. When I sharpen other peoples knives they look very happy, because they cut better. And Im happy because I can make other people happy. It also reminds me of my work.

Residents are encouraged to do tasks that help them to preserve a sense of individuality

As a boy, Koichiro Furuta dreamed of becoming a professional sumo wrestler, but abandoned the idea due to family pressure to take over his fathers rice paddies.

Now 84 and living at the Eniwa facility, Furuta describes living with dementia as bearable. Im getting old so its natural to forget things, but I am OK I dont really have a problem with my memory.

But he struggles to remember his age, and says he sometimes forgets the names of his family members, including his grandchildren. There arent that many things I enjoy now, he says. I often cut the weeds in the garden, and because I used to be a farmer I take an interest in the weather.

Furuta, who hasnt farmed for at least a decade, adds: I have no concerns right now, but I worry about being able to get enough water for my rice fields in the future.

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Companies are creating new devices and apps to mine seniors golden years and address the challenges of growing older

Silicon Valley has long sought to disrupt virtually every aspect of modern life. Now comes technologys final frontier: old age. Tech thats specifically designed for seniors is a growing market, fueled by inexorable demographic trends about 10,000 baby boomers turn 65 every day.

Senior tech is increasingly showing up in assisted living facilities and nursing homes. A company called Its Never Too Late proffers a massive 70in high-definition touchscreen computer that provides older people with little prior tech experience easy access to everything from travel videos and music playlists to a library of college lectures. Paro, a robotic seal stuffed with sensors and actuators that react to voice, light and touch, is being used to help those experiencing memory loss and social withdrawal.A movie system called 3Scape provides immersive 3D filmed content for the elderly and mobility-challenged in order to stimulate cognitive function and relieve depression and anxiety.

At retirement communities these days, technology is no longer a selling point, its an expectation, says Davis Park, executive director of the Center for Innovation and Wellbeing at Front Porch, a not-for-profit company that manages 12 retirement communities nationwide.

Paro is a robotic seal that responds to touch and sound. Photograph: University of Brighton/PA

San Franciscos Bay Area is ground zero for the emerging senior tech boom. The Trousdale, a new assisted living center in Burlingame, California, touts itself as a technology-driven community and innovation hub inspired by Silicon Valley.Every new resident at the Trousdale is issued a tablet computer, and all of the bedrooms feature smart sensor lighting that adapts to the routines of each occupant. Find the best version of you, declare print ads for the Trousdale, accompanied by a photo of three silver-haired residents crowded around a tablet computer, laughing uproariously.

Rhoda Goldman Plaza, a residential care facility in San Francisco, offers decision-support tools to address the challenges of growing older, including a Useful Apps club that allows residents to unlock the potential of your smartphone. The senior-targeted apps include pill organizers, medication reminders and guides on how the elderly can use Amazon Alexa.

Sunny View, a retirement community in Cupertino, California, features the sort of leading edge technology you would expect from a residential community located just minutes from Apples world headquarters.

Sunny View offers its residents everything from immersive 3D virtual reality systems to exergame bikes that use computer-simulated environments to promote wellness through competition.

Several tech companies have joined in on the gold rush to mine the golden years.Aiva Health, a Los Angeles-based startup, uses Google Home, Amazon Echo and smart speakers to support a mobile app for assisted living caregivers that manages help requests, performance reports, and remote controls for TVs, lights and thermostats. ElliQ, the sidekick for happier aging, is a robotic voice-enabled assistant designed to make it easier to make video calls, set medication reminders and arrange doctor appointments. GreyMatters is an interactive storybook app that pairs visual reminiscences with music and games to jog memories.The senior tech field is quickly becoming more crowded than the early bird special at a South Florida restaurant.

Right now, Ive got 15 startup companies waiting to pitch their technology, says Jennifer Bayard, senior vice-president of clinical operations at Carlton Senior Living, which operates 11 communities in northern California and has tested several new technologies at its facilities. My phone is ringing off the hook with calls from entrepreneurs.

Even venture capital firms are hoping to land a silver-haired unicorn. Honor, a San Francisco-based startup offering a technology platform that provides personalized senior home-care management, has raised $115m in VC funding. Los Angeles-based Renew Health, a startup promising to transform medication management, has raised $13m in seed money, and its employees include alumni from Microsoft, Oracle and Snapchat.

From smart toilets to virtual assistants

No area of life is safe from being disrupted by technology, not even the bathroom. The TrueLoo smart toilet optically scans and analyzes the contents of a toilet bowl to detect signs of dehydration, viruses and urinary tract infections. The TrueLoo is currently being tested at several northern California senior living communities and has secured a round of venture capital funding before it even hits the market.

Were creating the bathroom of the future, says Vik Kashyap, co-founder and CEO of Toi Labs, maker of the TrueLoo. Were trying to prevent health problems before they become too late to treat. And interms of the overall user experience, were trying to make it as seamless as possible.

This isnt the first time that tech startups have attempted to crack the senior market, and past efforts have had only limited success. But with the steady ageing of the baby boomers, many startups believe that this market is poised for explosive growth. The oldest baby boomers are now approaching their mid-70s; the youngest are old enough to qualify for a senior discount at McDonalds. By 2035, the number of Americans 65 years and older will outnumber children for the first time in US history. For a tech industry that worships at the altar of year-to-year growth, the numbers are enticing.

An elderly woman in Miami tests out a virtual reality device marketed to the elderly. Photograph: Rhona Wise/AFP/Getty Images

So far, technology aimed at seniors is a decidedly mixed bag. Some of it is truly transformative, significantly improving the lives of users by monitoring their health, stimulating their brains, exercising their bodies and connecting them to loved ones. Other technologies fail to live up to their hype, a reality familiar to tech users of any age.

Twenty years ago, the whole concept of having seniors engage with technology was looked at somewhat frivolously, says Jack York, president and co-founder of Its Never 2 Late, the company that designed the touchscreen computer system used at Sunny View.But seniors are just as thirsty to stay engaged as any age group. If you expose them to things that are meaningful to them, you get better behaviors, they eat better, theyre more engaged.

Togg, a device that uses wall-mounted radar sensors to monitor breathing, positions and activities of nursing home residents, has shown promise in limited trials. The technology employs algorithms that help predict falls by analyzing a wide range of data about an individuals motion, gait, heart rate and even number of trips to the bathroom.

Its really cool technology, says Neil Tantingco, owner of Evergreen Residence Assisted Living in Visalia, California. Were testing it right now in 15 rooms, but I want to make it a standard throughout the facility.

Voice-controlled virtual assistants such as Alexa have proved the most popular. Eskaton, a not-for-profit that provides services at more than 30 senior communities, recently deployed Alexa at one of its facilities and it became an instant hit. Less than 40% of residents were using standard tablet computers on a weekly basis. With Alexa, that rate climbed to 80%.

We didnt anticipate Alexa would be that popular, says Therese ten Brinke, Eskatons project coordinator. Voice control is so much easier and more natural for seniors instead of learning how to use a tablet.

However, other technologies fall well short of their promise. Standard laptop, tablet and desktop computers are far from being user friendly for older adults, who often struggle with complicated user interfaces and difficult-to-manipulate keyboard and mouse controls. Many become frustrated trying to perform even simple computer functions, much less advanced tricks like pressing the skip this ad button without accidentally clicking the nearby link that sends you to the advertisers website.

Other times, technology specifically aimed at older people seems to be a solution in search of a problem.

Were bombarded by a lot of startups selling technology, and some of them dont have things worked out, says Sylvia Chu, executive director of the Trousdale. I saw a presentation from one company that was selling a device that looked like a giant fax machine that dispensed medications with the press of a button. But it wasnt any better than having someone put the medications in a weekly pill organizer.

GeriJoy, an MIT startup, has designed a tablet-based application that lets older people interact with a virtual talking dog, which the company says helps users be less lonely because they always have someone to talk to. But when the device was tested at Evergreen Residence Assisted Living, it proved to be more alarming than companionable. The virtual dogs bark was harshly robotic-sounding, confusing many residents. To make matters worse, the remote caregivers tasked with interacting with users questions and comments over an Internet connection were based in the Philippines, causing technical and cultural problems.

Sometimes, the dog would answer a question and the patient would be two or three conversations ahead, says Neil Tantingco.

And because the remote caregivers were in the Philippines, they didnt always understand certain references. Like, they didnt know what Walgreens was.

Sometimes, the technology failed for a reason all too familiar to computer users everywhere: lack of tech support.

Technology for seniors is a great marketing tool, but unless you support it with training, its useless, says Candiece Milford, managing director of marketing at Rhoda Goldman Plaza. Its a constant learning curve because they forget how to use the device. Some of them are terrified when the computer screen times out and goes blank, because they think theyve lost everything.

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When her mother started to forget, the Guardians health editor began to examine how we look after loved ones living with dementia

She grips my hand and tows me behind her around the small courtyard garden, past the pretend bus stop and the red phone box with no dialling tone, down an alleyway of gravel that leads to a wooden gate. Here, she says. It may be locked.

It is, of course, securely padlocked. Its hidden away but still Mum has found it. I take her by the arm. Its OK. We can get out the other way, I say, leading her inside, through the chintzy cafe where no money is exchanged, to the lift. I bleep my electronic visitors pass. The doors to the outside world open for us. Mum walks through them, asking no questions, and admires the flowerbeds.

Even though she cannot remember what happened 10 minutes ago or when she last ate, even though this once immaculate lady, left to herself, would head for the street in a petticoat and one earring (But it doesnt matter, does it, she said when I mentioned it), in spite of the holes in her mind that dementia has torn, the desire to go out appears hardwired. She found that gate, and then she remembered where she had found it.

Earlier I watched as Jean, Mums neighbour in the dementia home, walked up and down the corridor between her room and the communal area, tall and thin in her plaid skirt and jumper, the usual copy of the Times under her arm and anxiety on her face. Up and down. Back and forth. Has my mother come? she asks the carers. No, Im afraid your family arent visiting today, is the answer. Her mother died years ago. They sit her down, suggest television or a game, and she is instantly on her feet, asking the same question again.

Mary Griffiths (above), a former nurse and housewife, wears a ring made from one of her fathers cufflinks

Dementia is the scourge of our age. We have become so good at patching people up bodily that for many, it is the mind that goes; dementia now kills more people than any other disease in England and Wales, accounting for 12.8% of deaths last year. In 2017 it affected an estimated 50 million people globally, with nearly a million in the UK; the numbers are expected to double every 20 years. David Cameron launched a research push for a cure in 2012, but one drug trial after another has collapsed, casting doubt on fundamental assumptions about what happens in the deteriorating brain. The central approach targeting the buildup of amyloid plaques appears to be going nowhere much.

Meanwhile, less attention is being paid to how we care for those whose minds are irretrievably unravelling, to where and how they should live. Most people in care homes 70% now have dementia. It may be best for many to stay at home as long as possible but that means 24-hour care. The distinction between day and night can disappear. One of the first warning signs my three sisters and I had came when Mum started annoying the neighbours in her block of flats, pressing doorbells to be let back in at 5am.

Then there were the parcels. I drove her home one day, to find a large brown box outside the door. Oh no, she said, in genuine distress. Not another one. It contained what she and I would both have called quack remedies for ageing: potions and pills, and a Christmas cracker trinket of a bracelet. Inside was an invoice, paid on her credit card, for over 100. She had not ordered or paid for it, she insisted. And there were others. She had a cupboard full of expensive soaps and knick-knacks a sound amplifier for 30 (there is nothing wrong with her hearing), a cabbage detox for 20. It had all been sent by two companies at the same address in France. I was livid. How dare they take advantage of her? But I now think she started it, sending off magazine coupons for hand lotion, though I know they got her to order more junk thereafter.

Norman Thomas, 68: My wife thinks Im losing the plot. She says I forget things… Shes right

Norman, a former dairy farmer and avid heli-skier, holds one of his ski caps

Its odd how the signals are there, but you dont see them. The flat smelling of burnt toast. I bought a new toaster. Her empty purse when she went out for coffee with friends. They paid. Her frequent trips in person to the bank. It didnt occur to me that she no longer knew her pin number. The huge bills she was running up for newspaper delivery. The shopkeeper kindly said nothing. The frightening times I called in the evening, when it was dark, and there was no reply. Finally she would answer, out of breath. She had taken the wrong bus. One time she said a nice man had driven her home.

Eventually my sisters and I understood she was no longer safe alone. She resisted any suggestion that she had a problem. I havent got that dementia, she told me, sternly. But she agreed her memory was playing up. I used that to trick her into a GP appointment and referral to the memory clinic, where she was diagnosed, although no help was offered. We bullied her into twice-daily visits from a carer, who would sometimes arrive to find Mum missing. At Christmas at our house, she caught a virus and ended up in hospital, wandering the corridors at night. Staff refused to let her home without full-time care.

Mum hated losing her independence, the same way she had fought us when we borrowed her car a couple of years earlier and did not return it. I asked the carers to let her go but follow her. At the home, where we moved her a year later because of her night wandering, and to be closer to my sisters, only the corridor and patio garden are open to her. She is not deceived, though she can no longer tell you whats wrong. She is a sundowner: after tea, she will walk and walk, up and down the corridor. The challenges of caring for people like her in the way she would want, if she were able to explain it, are great.

There may be another answer. In a suburb of Amsterdam, Jannette Spiering sits at a cafe table in the sunshine, while women like Mum and Jean wander past. Spiering is the founder of the Hogeweyk, a dementia village whose fame has travelled the world. She used to help run a conventional care home on the site, which was torn down, and believed she could do better.

We can try to come as close to normality as possible within the restrictions people with dementia have, she explains. These are mostly that they cant make their own daily structure, and they dont know when to eat, how to cook, how to dress, how to communicate. If they choose to go outside on a day like this, thats not for us to decide. Thats why the front door of every house is open. We have to take care, if its cold, that people put a jacket on and that their shoelaces are tied so they wont fall over them.

Irene Wilding, 92: If somebody told me I had dementia, I dont know what Id do

Irene, a former biology teacher, holds a photograph that hangs on her bedroom wall (she is bottom right)

Of course when people move in, they want to leave. I think I would, too, if I were locked up. But what I think is so lovely is you can go outside without someone watching or walking with you.

This is not a village in the traditional English sense. The houses, restaurant and a small theatre form the Hogeweyks perimeter wall. Look up and you see it is sandwiched between blocks of social housing flats. But there is space and sky. There are little gardens and a pond with statues of herons and a real one that takes off as I walk by. The 23 houses, each for six or seven people, are different and separate, but joined as they might be on a terraced street. Outside are shady courtyards with wooden tables and chairs, flower tubs and trees.

The Boulevard looks like a town street, but behind the shop fronts are clubs. Theres the Mozart room, where classical music lovers meet. Theres a painting and baking club, which Mum would enjoy, along with any sort of singing. She croons with Frank Sinatra and bops gently to Rock Around The Clock, given the chance. At the Hogeweyk, families sign up their relatives for the clubs that will suit them, though too many activities can exhaust people, Spiering says.

In the square, cafe tables are set beside a fountain. Off it is an arcade, with a waiter-service restaurant and a supermarket where the carers shop for each house. If residents wander out with a packet of cereal or a bottle of juice, it can be returned or paid for later. And there is a pub: there is no reason why people with dementia shouldnt enjoy a drink, although one daughter was scandalised that her non-drinking mother developed something of an advocaat habit. She blamed us, but her mother just liked going there, attracted by the music or whatever, Spiering says. People can change for better or worse; some start to use bad language; inhibitions disappear.

The Hogeweyk has its wanderers. A woman with Jeans tense face walks the village paths stiffly and finally passes through sliding doors into the reception area, ignoring the notice that says Sorry, were closed. Behind their glass screen, the staff watch. She gets halfway to the double doors on to the street, which will not open unless the receptionists press their button, stops abruptly as if she has remembered something, turns around and walks back into the village. One of more than 100 unpaid volunteers intercepts and takes her for a coffee, to distract her. There is still some part of her mind that recognises this is not her home and she cant accept it. I think it is very sad, Spiering says. Some residents walk all day long, so there are distractions to encourage rest: a large TV screen with seats in the arcade, and cafe staff instructed to invite wanderers in for a drink.

There is an element of the gilded cage of the 60s TV series The Prisoner, or The Truman Show, but while residents cant get out, the outside world is invited in. Young mothers and toddlers meet here weekly. Locals use the restaurant and go to the theatre.

The Hogeweyk is not for the mildly ill. Everyone here has late-stage dementia. The average stay is 2.2 years, but some people die within a few weeks. Only three out of 169 residents are in bed all day, Spiering says, and these three are not segregated. We put them in the living room with their bed, because they can still smell and hear what is going on and be part of it. There is no sign of the agitation or aggression that often signals distress in people with dementia, no howls of anguish through an upstairs window.

Instead of severity of disease, as in the UK, the Hogeweyk allots residents to houses according to lifestyle. Its not a class thing, Spiering says, nor anything to do with race: its about familiarity with your surroundings. The families choose which lifestyle is the best match. There are seven urban, artisan, Indonesian, homey, Goois [a wealthy area near Amsterdam which once had its own dialect], cultural and Christian. The urban houses are home to former city dwellers; the artisan houses to people who had a trade or craft. The homey houses are for people, like my mum, who were homemakers; those who loved theatre and cinema are in the cultural houses. The decor and food will be typical of those communities. Some will prefer meat and potatoes; others are mostly vegetarian. The music is folk in some houses but classical in others; the newspaper on the table will be a tabloid or broadsheet.

Such segregation has its critics, but Spiering argues it is just what we all do for ourselves. We buy into certain lifestyles, or move to be part of a community we feel comfortable in. It doesnt mean people wont mix at the bingo group.

Kathleen Bishop, 81: Its frustrating, her husband, Allan, 84, says. We cant have proper conversations

Kathleen, who used to teach shorthand and typing, holds a photograph of her wedding to Allan

There may be an element of fantasy, but it is no more than in more traditional dementia homes such as my mothers, where people like Jean walk an endless loop of corridors decorated to look like a high street, with Singer sewing machines in alcoves and pictures of the Coronation to recall an epoch that is more vivid in the brain than the recent past. Reality is a tricky concept when it comes to dementia care, as Spiering points out. Some people want to go home, or wait for a visit from their long-dead partner. We try to distract people, or we go along with them. We say, Is it OK if we go for lunch first? You can say its a lie or you can say its not telling the whole truth.

Dementia used to be dismissed as normal memory loss, a side-effect of ageing. People tended to die of other causes, much younger, so it was less understood. When German psychiatrists Alois Alzheimer and Emil Kraepelin classified it as a disease in the early 20th century, they focused on younger patients. The deterioration of the brain in old age was still regarded as an inevitability.

But by the mid-50s, US hospitals began to be overwhelmed by elderly dementia patients. Psychiatrists started to frame it as a psychosocial problem, finding that people from some backgrounds, with the same brain changes, did better than others. There were calls for programmes of activities to keep ageing minds stimulated. After Medicare, the US healthcare programme for the over-65s, was founded, people started to live even longer lives and dementia soared. By 1980, everybody had heard of Alzheimers disease. Funds have been poured into research, mostly to find a pill to reverse it, without success.

Patients like my mum, who get a diagnosis, are prescribed a single drug, supposed to help slow the disease, and sent home. There is nothing more the NHS can do, or afford. Age UK and Alzheimers charities offer helpful advice, but you have to seek it out.

A third of people with dementia are in care homes, which seek to calm and stimulate residents whose memory of the recent past goes first. The walls are lined with photographs of Charlie Chaplin, Ava Gardner, the Queen as a girl. There are wartime singalongs. Living in the past is fine, as are white lies. We take Mum out for ice-cream and cakes at a garden centre, where last time she was overcome by the beauty of the flowers. I cant believe it, she kept saying. We stay in the present moment and talk about the mackerel sky and the planes she thinks are birds. We never talk about dementia.

The truth used to be served up cold. Reality orientation was developed in the late 50s, on the basis that exercising the memory would keep it functioning better for longer. Patients were trained to know the name of the place they were in, what month it was, who the prime minister was but it was confrontational and insensitive. If people knew that it was Thursday and that they were widowed, it didnt make them happier.

Instead the focus moved to cognitive stimulation gentle activities to keep the brain going, such as word games, puzzles, music, and practical activities such as baking or indoor gardening. A Cochrane medical review in 2012 found that 45-minute sessions at least twice a week helped people with mild to moderate dementia. There was some evidence that people were better able to reason, communicate and interact with others, and had a better quality of life. Such activities are now standard in dementia homes and day centres, along with dancing and gentle exercise and singing, all of which Mum loves. And how else would she spend her time?

Tom Ledson, 76: Everyone hopes for the future. You just have to hope that it carries on

Tom, who used to run a motor parts shop, holds a photograph of his wedding day

There are other theories. Penny Garner in Oxfordshire, whose mother had dementia, devised Specal (originally an acronym for specialised early care for Alzheimers) to help families and carers communicate with a relative who has dementia. At the heart of this is the photograph album the concept that people have memories stored like photographs, recording feelings as well as facts, and that when the facts disappear, the feelings remain.

Garner considers dementia a disability and has three golden rules: dont ask questions that will only cause distress when the person cannot find the answer; listen to the person with dementia and offer them only information that will make them feel better; and do not contradict. Her son-in-law, the psychologist Oliver James, wrote a book about the method, called Contented Dementia, and many of its adherents are enthusiastic. But the Alzheimers Society is outright opposed, arguing that not asking questions deprives people of choice and control over their lives.

The society is not enthusiastic about the idea of dementia villages, either. Dominic Carter, its senior policy officer, agrees that people have to be understood, offered activities and encouraged to eat and drink, but thinks it is a shame if we are willing to accept that the only way to do that is to segregate people and have them in environments that are so specifically focused.

Instead the society wants to normalise dementia, with a flagship programme to accredit dementia-friendly communities ordinary towns where the baker and hairdresser have been taught how to talk to people with dementia, and where local residents and bus drivers will be better able to see them safely home. So far, it has registered 400 communities, from Minehead to Billericay and beyond. Local Alzheimers groups enlist shops, GP practices, libraries, churches, fire, police and social groups, whose members undertake training. There are also activities. Over one week in May, in Tamworth in the west Midlands, there was singing in the shopping centre and community knitting of forget-me-nots to aid the societys dementia campaign, which includes a call for a 2.4bn government fund to help people with care costs.

People with mild dementia will be safer and happier in a town that has more understanding, although the chances of getting lost in a city like Leeds must still be high. But as the disease progresses, the need for full-time care grows. While we might dream of Grandma sitting in a corner of the family home, watching life going on, being looked after by her children, thats a fantasy, says Professor June Andrews, former director of Stirlings Dementia Services Development Centre in Scotland.

Its never been families taking care of their own, she says. Its been women. The extent to which it happens is related to the economic value of women. In countries where women are uneducated and unemployed, they do the caring, she says. As soon as the daughter or daughter-in-law can get a job, they start importing a foreign domestic worker. And once those salaries rise out of reach, care homes spring up.

In the UK, there will be a shortage of 30,000 residential dementia places by 2021; the costs remain high and the quality is sometimes questionable. The Care Quality Commission reports that more than a fifth of services either require improvement or are inadequate. Is the Hogeweyk model the answer? It has been controversial since its inception in 1993. Medical experts didnt like it, while other care home owners feared for their own business model. In the UK, the notion of a dementia village has been dismissed as gimmicky and too expensive often by experts who have not visited. Although it is run as a not-for-profit, the cost for each resident is 53,000-59,000 a year, paid for by the government. Local authorities in the UK pay about 30,000 to 40,000 for a residential care home place.

Christine Judith (July) Hopkins, 77: Sometimes I dont know, sometimes I do know. You understand?

July, who was a homemaker and teacher, holds a photograph of her younger self

Andrews is sceptical of the Hogeweyks lifestyles approach but says her own parents a bus driver and a secretary would never have been comfortable in a posh care home. Having something that fits with what somebody is comfortable with is really important, she admits. But how would you categorise people in the UK, or find the volunteers the Hogeweyk relies on? The bottom line is, who is going to be able to afford your model if it can only work with an army of volunteers? In the UK, hundreds of care homes are having to shut down because their buildings are not the right quality and they cant get the right staff.

But New Zealand and Australia have similar villages, and the first to be modelled directly on the Hogeweyk is likely to open in the UK later this year, in east Kent. Henry Quinn and Dr Phil Brighton, from East Kent Hospitals Foundation NHS Trust, tell me they were profoundly moved when they visited the Hogeweyk in 2015. What struck me most was when they said, The most important things are the front doors. If you have a front door and its raining, you can go out and get wet, Brighton says.

Quinn went up on to the roof of Buckland hospital in Dover and spotted six semi-detached blocks of derelict houses. They got funding from Europe and are on track to open soon.

Its a gated community, Brighton explains. There will be a boundary fence but not obtrusive or oppressive. There will be a hub where locals and residents with dementia can go for entertainment, as well as a cafe and a gym. The houses will have five bedrooms each and no locked doors. The team are exploring ideas with the local community, including keeping goats and forging links with a primary school, bringing children in for activities.

If we let them, people with dementia take buses to the end of the line. One man, used to global travel, evaded his carer, travelled to the airport and hopped on a plane to the country where he grew up. People in residential homes used to be restrained, tied to chairs. That doesnt happen any more. In the dementia-friendly communities the Alzheimers Society promotes, technology might allow more wandering. There are already GPS devices, informing relatives of peoples whereabouts whether they want it or not.

And that is the hardest part: knowing what someone wants. We make decisions for those with dementia in the hope of protecting them. Sometimes, when you hear of a woman, such as a friends mother, rocking in her seat, whispering, Help me, help me, you have to wonder if we have got it right.

My mum hates locked doors. When she lived in her flat, there wasnt a day when she didnt potter to the local shop or get the bus to town. It saddens me to see her wanderings reduced to a corridor and now, even though she is in a safe place with wonderful carers, she is starting to fall; last time I visited, I found her with bruises in another residents room, as she frequently is. And for the first time, I did not get the sense that she knew who I was.

For Spiering, caring for people with dementia is all about calculated risk accepting frailty and that, in nursing homes, people are going to have falls, and are going to die, and we cant prevent that. But we can add quality of life. And its not by locking them up and not seeing them as human any more.

My mother is well looked after, by people who see her as human and lovable but I am disturbed by her constant desire to leave. I want her to be safe, but even more than that, I dont want her to be unhappy. Most of all, I want her to live the life she wants, in the little time she has left. And it hurts that she cant tell me even if she knows what that is.

All the people photographed and interviewed either live or spend time at villages run by Belong, a charitable UK organisation that provides care, housing and support for people with dementia.

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