Testosterone

Testosterone is a Japanese-language author and content creator who publishes mental fitness, sleep, habits, health, career, and self-care content across X, Instagram, and YouTube. He shares short text posts, sleep checklists, book promotions, sauna and supplement recommendations, and video explanations of concrete methods. The account notes 2.15 million X followers, over 1 million books sold, high school and university time in America, a mixed martial arts background, and roles as founder of OWN, ichido, and BLVCKOUT.