Sachiaki Takamiya is an author and he is the founder of the Ikigai Diet and Ikigai Bio-Hacking. He developed these two health methods based on centenarians in Japanese blue zones and Shizenha people, Japanese naturalists who live in the countryside leading organic lifestyles.

He won the outstanding performance award of the Next Publishing Award in March 2022 with the book, The Ikigai Diet. As an author, he has written several novels in Japanese, such as Tenjo-no-Symphony and Hyakusho Revolution.