The concept of longevity and the pursuit of a long, fulfilling life are central themes in Ikigai. Through their exploration of the lifestyles and philosophies of centenarians, particularly those in Okinawa, Japan (See: Background), the authors present a set of strategies for longevity that encompass physical, mental, and social aspects of life.

One key strategy for longevity highlighted in Ikigai is the importance of maintaining a healthy diet. The varied Okinawan diet, characterized by its diversity and emphasis on plant-based foods, is presented as a model for healthy eating. Moreover, the concept of hara hachi bu, or eating until one is 80% full, is emphasized as a crucial dietary practice that promotes health and longevity. The authors note that, “Okinawans consume, in general, one-third as much sugar as the rest of Japan’s population” and “They consume fewer calories: an average of 1,785 per day, compared to 2,068 in the rest of Japan” (124). This calorie restriction, combined with a diet rich in vegetables, fruits, and whole grains, is believed to contribute significantly to the longevity of Okinawans.

Another strategy for longevity discussed in the book is the cultivation of strong social connections and community involvement. The authors highlight the Okinawan concept of

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