@Kirin-kun Assumin' he has one. Considering the deviant fetishes of his boss, I wouldn't be surprised if he uses it to lick ass instead. Whose? I'll leave that up to your imagination.
No seriously why make some experimentations with adding the abilities of murderers in people, when the X-Men exist in your world. How is it that these mere Yakuza have so many people with literal superpowers?