If I remember correctly, there was a top Yakuza member years back by the name of Makito Takahashi, Takihoshi, or some similar spelling, who was one of their top bosses in charge of loanshark-usury operations.

He was known as a very vicious gangster. One of their most feared.

They have a storied history. Although I never delved into them, the Yakuza does intrigue me.