- One Japanese person in every 1,450 is now aged over 100 – and women account for 88.4% of centenarians.
- Okinawa, a Japanese archipelago, is one of the world’s five Blue Zones, where there are high concentrations of centenarians.
- A member of the Okinawa Centenarian Study research team, Dr. Bradley Willcox, explains some of the secrets to living a long and healthy life.
On the sub-tropical Japanese islands of Okinawa, they have a saying: Live far enough away from your family so you’re not running into them every day, but close enough to take them a warm bowl of soup – on foot.
Many of us during the past 18 months would have benefited from living within walking distance of our family. We’ve had to make do with Zoom calls instead – and the loss of social connection has affected our well-being and mental health.
Socializing is one of the reasons many Okinawans live healthily to 100 and older. So says University of Hawaii geriatrician and Director of the Kuakini Center for Translational Research on Aging, Dr. Bradley Willcox, who with his anthropologist twin brother, Craig, of Okinawa International University, has been studying centenarians on the islands for more than 20 years.
It’s one of the world’s five Blue Zones, where there are high concentrations of centenarians.
“You can’t walk down the street without running into one,” says Dr. Willcox, who co-authored The New York Times bestseller, The Okinawa Way in 2001, to explain his team’s findings.
New centenarian record
Japan’s centenarian population has just hit a record high of 86,510, according to its health ministry, an increase of 6,060 from 2020 – and up from just 153 when records began in 1963.
It means that one Japanese person in every 1,450 is now aged over 100 – and women account for 88.4% of centenarians, including Kane Tanaka, the world’s oldest person at 118 years.
In Okinawa, there were almost double the number of centenarians per 100,000 people in 2015, as there were in Japan as a whole.
Why longevity matters
The Okinawa Centenarian Study, started by Dr. Makoto Suzuki back in 1975, is the world’s longest, continuously running study of centenarians. The team has studied more than 1,000 100-year-olds to understand the genetic and environmental lifestyle factors responsible for healthy ageing.
The findings shared in their 2001 book included clean arteries and low cholesterol; low risk of hormone-dependent cancer, with 80% less breast and prostate cancer than North Americans; strong bones, with half the risk of hip fractures of North Americans; lean and fit bodies and remarkable mental clarity.
All this means the burden on Okinawa’s healthcare system is lower, as the population ages. Healthier ageing could also bring economic benefits, according to the World Economic Forum’s Global Future Council on Healthy Ageing and Longevity.
“If you can extend not just lifespan but human ‘healthspan’, you can get more productivity, people will be happier, and have less risk of dying of cancer or cardiovascular diseases,” agrees Dr. Willcox.
“If we can find out the mechanisms of ageing, why and how we age, and then help people in society live healthier, longer lives, that’s going to be one of the greatest discoveries in the history of medicine.”
Here, Dr. Willcox explains some of the secrets to living a long and healthy life, the Okinawan way, which really boils down to “balance”.
1. Practice ‘hara hachi bu’, eat for health and exercise
Older Okinawans believe the body is a temple and you shouldn’t pollute it. They drink alcohol in moderation and generally don’t smoke much. And they’re very active people, their calorific intake to output is always in near balance and often net-negative, so they burn a lot of fat. Their diet has been largely plant-based, so not calorie-dense. They eat over a kilogramme of vegetables and fruits and legumes, like soya beans, a day. It’s part of every meal. Instead of bread, the chief carbohydrate has been the sweet potato, which has a low glycemic load and lots of plant compounds, particularly colourful flavonoid compounds that really can help with overall health and possibly slowing the ageing process. They also practice hara hachi bu – eating until they’re just 80% full.
2. Be positive and find your ‘ikigai’, sense of purpose
All the centenarians we meet have a positive attitude. They are generally optimistic, and have this laissez-faire, carefree approach to life – they’re fun-loving people. I think it’s really important to enjoy life as you age. They also have something we call ‘ikigai’, which is the Japanese word for a sense of purpose. One guy was 102 years old and his ikigai was these two prize bulls – he went to see them every day, to take care of them. Another person’s ikigai might be family or faith.
3. Stay mentally engaged
There’s no word for retirement in the Okinawan language, so until recently, it just wasn’t a concept. You just did what you always did, so if you’re a farmer, you still farmed. I think once you stop doing something that you’ve done, especially if you enjoyed doing it, and it gave you a sense of purpose, you could go downhill quickly. So the idea is just to stay engaged. That helps them a lot with life satisfaction and it decreases healthcare costs because people are staying active physically and mentally their whole lives.
4. Join a ‘moai’, social group
Okinawans have large families and strong social support networks. Their communities are really close-knit and everybody knows everybody. They have social gatherings in groups known as ‘moai’. The women chat about stuff, they drink green tea, and maybe have a little dessert, and the men might smoke cigarettes, and drink alcohol, which might partly explain why they don’t live so long as the women. But generally, they love to get together.
Okinawa had the lowest healthcare costs in all of Japan, despite being the poorest, because they were healthier. In 2000, Japan implemented the Long-Term Care Insurance Program throughout the country – and it involved paid daycare for adults. Okinawans, being social types, make the most of it – and it drives down healthcare costs over the longer term because people with more social contact will be happier and healthier.
5. Stress less and rethink your relationship with time
You’ve probably heard the term ‘hurry sickness’ – we’re all trying to make deadlines. In the COVID-19 pandemic, lots of us can work from home, but then we all get consumed with calls. Okinawans have a slower sense of time, nothing seems to start on time, but they do get stuff done eventually. And at the same time, they have these stress-resistant personalities, throughout history – they have learned how to deal with tragedy and pain.
We’ve even found recently in our research in Hawaii, a stress-resilience gene, called FOXO3A, that’s associated with human longevity. If you have just one copy from your mum or dad, you have two to three times the chance of living to be 100. The general concept is it protects you against the bad effects of diseases and I think probably other stresses on the body. Okinawans have a very minimally higher percentage of this gene – but they make the most of it.
6. Embrace your spirituality
Okinawans are very spiritual people and they’re very practical people when it comes to spirituality or religion. Every year, they visit their ancestors and have a picnic and talk to them like they’re still there. They maintain this connection through the generations, so there’s a sense of continuity there. They have their own indigenous religion, that’s more animist, so they believe there’s a spiritual energy in everything.
Traditionally the religion was run by the women, they were priestesses. There are sacred groves around Okinawa, where the women still go and meditate and pray for peace and health. Buddhism has come into the culture a little bit, but you still have this indigenous religion. Every village has a priestess and the women are very in tune, not just with themselves but with nature. They’re among the most healthy and powerful women I’ve ever seen.
The World Economic Forum’s Sustainable Development Impact Summit is looking at solutions to some of the world’s most pressing issues. Watch this session to learn about how we will look after the world’s ageing population through sustainable retirement and pension systems.