Yakou Hikoichi is a character in the manga Usogui. He serves as Referee #2 of Club Kakerou. Together with Nowa Mitoshi, he is the oldest referee in Kakerou. In addition to presiding over games as a referee, he is an expert in collecting debts and is nicknamed "Debt Collector". He has a twin brother, Yakou Jouichi. He is Madarame Baku's exclusive referee.
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