His True Identity Episode 9

Using the power of the mirror of the netherworld, Ki and Keika succeed in seeing Shouken's memories. Through his memories we learn of Shouken's history and how he came to the Tanmoku family. Ki is also able to ascertain that the reason for all of Shouken's actions while he was his bodyguard and a critical conversation between Shouken and his brother Sekijin is overheard.