Reiwa's Yamaguchi-gumi (Shincho Shinsho) Mitsuhiko Yamakawa From its formation nearly a century ago, the drama of the first and second generation leaders, the charisma of the third generation who built a powerful position through gang warfare and the entertainment business, the assassination of the fourth generation leader, and the Yama-Ichi conflict, followed by the fifth generation's "national domination" – but in recent years, this largest domestic yakuza group has been cornered both internally and externally, facing fierce battles with authorities, exclusion from society due to laws and ordinances, and even a split caused by dissatisfaction with the "one-strong" system. The history of its transitions and the entire organization, from the Taisho era to Showa, Heisei, and the present Reiwa era.