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|Please note: This article is about the oversee of Broken Wave City. For other uses of the term, please see Ryoma (disambiguation).|
Yoritomo Ryoma was a member of the Mantis Clan. He was overseeing the construction of a break wall for Broken Wave City when a Ningyo tunnel was discovered beneath Kaigen's Island. Ryoma enlisted the aid of Moshi Kameko to investigate the tunnel. 
- ↑ Strongholds of the Empire, p. 9
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