Yakuzza -

The ritual of cutting off a finger joint (usually the pinky) as an apology for a mistake.

The name comes from a losing hand in the card game Oicho-Kabu : 8 ( ya ), 9 ( ku ), and 3 ( sa ), which totals 20 and equals a score of zero—literally meaning "good for nothing". yakuzza

The three largest groups as of 2025 are the Yamaguchi-gumi (the largest), Sumiyoshi-kai , and Inagawa-kai . The ritual of cutting off a finger joint