Tonbei's subordinate, Gensuke, is sent to find the true identity of Kongō of Kōga, the Phantom chief, in the Edo Castle library but is killed and impersonated by Yamizato Danjō who gives the Iga group false information. and tries to divert suspicion to Lord Mizuno as being the 'Lord of the Night'.. He then attempts to impersonate Tonbei in order to lead the Iga ninja into a trap and kill them all but is foiled by Shintarō and killed.
