Kotarō kidnaps Kaori and demands she give him the Wind Thunder mirror. She refuses. Shintarō takes Kitobō prisoner and offers to exchange him for Tonbei and Kaori but Kitobō says Kotarō would have him killed for less. He tells him the Fūma are the only group who could overthrow the government. Shintarō makes him lead the way to the Fūma hideout, unaware Tonbei has already escaped. Three Fūma ninja attack Kaori's father, Sōshūya, for the Wind Thunder mirror but Tonbei has already taken it for safe-keeping, leaving a glass fake. Shintarō decides to finish the journey to the hideout by boat as it would be harder for the Fūma to attack on water but Kotarō has detailed one of his ninja, Naminosuke, a specialist in water tricks deal with him. The boat is attacked by the Fūma dragon ship, a wooden submersible.
