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.
This is the key to our home. 
Keep it with you.
Das ist der Schlüssel zum Haus.
Nimm ihn.
Es la llave de nuestra casa, llévatela.
Es la llave de nuestra casa, llévatela.
Questa è la chiave di casa.
Tienila sempre con te.
Esta é a chave para a sua casa,
mantenha-a com você.