The Shadow Army 3

In 1657, during the devastating Edo fire, former Kishu fencing instructor Seigan Marume attempts to kill Iemitsu Tokugawa's widow Lady Takako Honriin. As Lady Honriin's loyal samurai defend her life, she disappears amidst the burning castle. Upon learning that Lady Honriin is still alive, Seigan manages to discover that she's disguised herself as a nun at Senshuan temple. Hanzo Tarao and his band of "Shadow Warriors" confront Seigan and his army of ninja in front of Senshuan temple. Seigan and Hanzo duel to the death. Afterwards, Lady Honriin proposes an alliance between herself and Hanzo.
The "Shadow Warriors" also help to protect the the "Lady Nun" from the Lord of Kishu who continues to search for Iemitsu's widow and who is hell bent on removing the current Shogun (Iemitsu's son and Lady Honriin's adopted son) and replace him with his own son. One day, through a medium, the spirit of the late Shogun Iemitsu is contacted. This leads the Lord of Kishu's supporters to discover the whereabouts of both Lady Takako Honriin and the "Shadow Warriors". The Lord of Kishu then influences the current Shogun to send his Samurai to hunt down the "Shadow Warriors". Pursued by the Shogunate forces, the "Shadow Warriors" are forced into hidding. Seeking vengeance against the evil Lord of Kishu, the "Shadow Warriors" enter the Lord's castle by disguising themselves and accompanying an imperial envoy, and although their quest is costly, their goal is finally achieved. (Toei)