Someone said to me,” In the Japanese sense, it’s not about morality or injustice, it’s about face and honor.” I’ll give you an example of that. That’s Yakuza. It can be said that it is cancer in Japan. Police officers call Yakuza Bouryokudan (violence groups), but Yakuza members often call themselves “Gokudou” (Adelstein: Tokyo Vice, p. 3), which means the ultimate path. First, I will write about the background and history of Yakuza. After that, I will introduce various crimes committed by Yakuza.