I grew up in Japan, where I was taught from a young age to think of food as medicine. My grandmother is 92, and she also credits her longevity to eating the right foods. Japan is home to some of the world's longest-living people: There are now 90,526 centenarians, or people aged 100 and above. And the tiny, remote Japanese island of Okinawa has been singled out as having the highest concentration of centenarians in the world. As a nutritionist who follows a traditional Japanese diet, here are five foods my family and I eat every day to stay healthy and live longer:

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