"「組長、若頭3人暗殺事件から約40年逃亡の末に」 4代目山口組・竹中組長射殺犯はいかにして逃げ続けられたのか"["After nearly 40 years on the run since the assassination of the boss and three underbosses" How did the assassin of Yamaguchi-gumi boss Takenaka manage to stay on the run?]. Daily Shincho (in Japanese). September 19, 2024. Retrieved November 2, 2024.[dead link]