TIL: that Hisayuki Machii, the founder of one of Japan's most notorious Yakuza gangs, was Korean.

https://en.wikipedia.org/wiki/Hisayuki_Machii

https://www.reddit.com/r/todayilearned/comments/15ojhkg/til_that_hisayuki_machii_the_founder_of_one_of/