We've been hearing more and more about the Okinawa Diet recently, named for the small island off of southern Japan that is home to some of the longest-living, healthiest people on the planet. They not only don't die of the usual western diseases like heart disease and diabetes, but many of them live independently and actively (and happily) well into their 90s.

So what's their secret? It turns out they eat an enormous array of foods every single day, up to 18 different vegetables and fruits, and they also eat foods that grow in three specific places: In the ground, in the form of roots, above the ground in the form of vegetables, and in the sea, in the form of algae and seaweed. And each of these environments affords the foods different vitamins, minerals, antioxidants, and micro compounds that create a spectrum of healthy nutrients to fuel a body that can fight off disease.

So the takeaway is that we need to add more variety to our plates, not just focus on one superfood or a small cadre of nutrients. Getting more types of plant-based foods into your diet is the key.

Here is a story by Kaki Okumura, who writes a wellness blog called kakikata about how to use Japanese principles to live a longer, happier life–wherever you may call home.

Okinawa, an island prefecture in southern Japan, stands out among a country that is already well known for longevity. They have a much lower rate of coronary heart disease compared to mainland Japan.

Mortality rates from coronary heart disease and cancers in Okinawans, Japanese, and Americans (Source)

A separate study on Japanese centennials living in Okinawa, where the researcher went back and analyzed at what age these individuals were able to live independently (cook for themselves, do their own house chores, live in their own home, among other factors), came to another fascinating discovery: The study was only on 22 individuals, but among them, 82 percent were still independent at a mean age of 92 years and about two-thirds at a mean age of 97 years old — a lot of Okinawans don’t just live long, it seems they live long active and happy lives.

There are many factors to a healthy life, but a big one is a diet. In an interview with CNN, the researcher leading the study, Craig Willcox, shared that he found Okinawans typically eat seven different fruits and vegetables and 18 different foods a day, and more than 200 different foods and spices regularly in their overall diet.

I thought to myself, how do they do this? Isn't it difficult to get so many different kinds of vegetables and food in one day? But if you consider one of the most common and famous Okinawan foods, a stir-fried vegetable dish called chanpuru, maybe this isn’t so impossible. Chanpuru means “to mix together” and can be a variety of different vegetables, but a classic version would include bitter melon (goya), tofu, egg, and bean sprouts, sometimes with carrots, cabbage, or onions. This is often served with a side of sweet potato and miso soup, which is frequently made with seaweed, tofu, and daikon radish. Okinawans also often enjoy a portion of fruit after or between meals, such as pineapple or papaya with some freshly brewed jasmine tea.

Eating an Assortment is the Key to Success on the Okinawa Diet

It’s not limited to chanpuru — many Okinawan dishes are often an assortment of different vegetables, such as Okinawan jyushi or papaya irichi. Their diet is particularly aware of the idea of eating lots of different kinds of vegetables every day — meals are often colorful, and include an assortment of leafy vegetables, root vegetables, and sea vegetables. Suddenly, I could see how one could easily get so many different kinds of vegetables in one day.

And this is why the Okinawan diet works: Their focus is on getting a large variety of fresh vegetables and fruit, rather than becoming hyper-focused on increasing your intake of one “superfood” vegetable or eliminating an entire food category that has been deemed “bad” by the public. Their meals are never just tofu or bitter melon, and they’ll frequently have rice or noodles, instead of just sweet potato. Their meals are often a colorful assortment of different vegetables and food types, of different colors and textures.

So don’t worry about eating more “superfoods” like kale, tiger nuts, or Indian gooseberries: The key to eating well is paying closer attention to the variety of fresh fruits and vegetables you eat in a day — seven a day if you can.

If you enjoyed this piece, please write to Kaki at kokumura@kakikata.space with any questions on Japanese cuisine or culture.