Jirobo was trapped by Sagen and Iga Ninjas; Jirob’s on the verge of death, but he's saved by a bizarre demon-entity. The secret Jirobo is guarding is of that kind of magnitude. It all started further back in time, in 1559, when Nagao Kagetora -eventually called Uesugi Kenshin- and Taehime, the Chief Advisor Konoe Sakahisa’s younger sister, had a small exchange of mutual feelings ...
I know you were Kenshin's number one ninja.
Sé que eras el shinobi 
más allegado de Kenshin.
Sé que eras el ninja 
más allegado de Kenshin.
Je sais bien que tu étais
 le plus fidèle
Sei que você era o ninja 
mais importante de Kenshin.