The catalyst for the events that unfurl in Episodes 3 and 4. After a dramatic loss at one of Rikiei's gambling establishments, he is pressured to give up either the deed to his business or his daughter, Osuzu, in order to cover his debt.

He pleads with Kawara Heitarou for help, suggesting that Rikiei's establishments practice dishonesty. Kawara refuses, citing a lack of evidence. Daigoro has no choice but to give up his store, but Ishimatsu takes Osuzu as well after Sosuke tries to intervene.
(Source: Wikipedia)