YouTube show coverage leads to over 10,000 copies sold! 'The Manager Who Lived in Japan's Top YouTuber's House' (by Ryusei Kuwata) released on March 16.

Sunrise Publishing Co., Ltd. released 'The Manager Who Lived in Japan's Top YouTuber's House' (Author: Ryusei Kuwata) on March 16, 2026.

◆ About the Book This book is a documentary that systematizes the 'success structure' and 'human charm' of YouTuber Hikaru, observed by entrepreneur Ryusei Kuwata during his cohabitation at Hikaru's home, where he arrived almost as a 'runaway.' The first half covers the 'true face and backstage of Japan's top YouTuber,' the middle section explores 'laws of thinking that support success,' and the latter half develops into Kuwata's own management philosophy and human perspective. Through the 'phenomenon' that is Hikaru, the book unravels the 'structure for creating obsession' in modern times.

◆ Author Profile Ryusei Kuwata: Representative Director of Tsuhan no Tora Co., Ltd. After starting his own host business at age 22, he expanded into restaurants, cram schools, and other ventures, achieving an annual turnover of 5.1 billion yen. He also serves as the general director of 'Reiwa no Tora' with 1.5 million subscribers. Author of 'Host 2.0: How to Earn in the New Era of Kabukicho'.