The authors of Ikigai were greatly inspired by:
Breznitz, Shlomo, and Collins Hemingway. Maximum Brainpower: Challenging the Brain for Health and Wisdom. Ballantine Books, 2012.
Buettner, Dan. The Blue Zones: Lessons for Living Longer from the People Who’ve Lived the Longest. Retrieved via http://www.bluezones.com/2016/11/power-9/#sthash.4LTc0NED.dpuf.
Csikszentmihalyi, Mihaly. Flow: The Psychology of Optimal Experience. Harper Perennial, 1990.
Frankl, Viktor E. The Doctor and the Soul: From Psychotherapy to Logotherapy. Vintage, 1986.
———. Man’s Search for Ultimate Meaning. Basic Books, 2000.
———. The Will to Meaning: Foundations and Applications of Logotherapy. Meridian/Plume, 1988.
Friedman, Howard S., and Leslie R. Martin. The Longevity Project: Surprising Discoveries for Health and Long Life from the Landmark Eight-Decade Study. Plume, 2012.
Morita, Shoma. Morita Therapy and the True Nature of Anxiety-Based Disorders. State University of New York Press, 1998.
Taleb, Nassim Nicholas. Incerto series: Fooled by Randomness, The Black Swan, The Bed of Procrustes, Antifragile. Random House, 2012.
Willcox, Bradley J., D. Craig Willcox, and Makoto Suzuki. The Okinawa Diet Plan: Get Leaner, Live Longer, and Never Feel Hungry. Clarkson Potter, 2001.