Yoritomo Utawa was a Mantis Clan bushi and courtier during the War Against the Shadow, owner of the House of Crystal Water. Utawa was among several Rokugani who joined the Cult of Ruhmal. Utawa arranged for the murders of Seppun Horiken, Seppun Junichi and Seppun Oronoko after Horiken had begun investigating the cult. However, these murders led Otomo Banu, Junichi and Oronoko's charge, to initiate an investigation of his own. The group that led Banu's investigation eventually found and killed Utawa in 1131.