Ep. 15: Tenzen slays Gyoubu on the ship, leaving four ninja remaining on each side.
Aired on July 20, 2005

15
The Kouga approach Miya Port while Tenzen survives Gyoubu's attack and prepares to fight back. They engage in a cat-and-mouse game, taunting each other about past events between the Kouga and Iga. Gyoubu recalls training with his father and developing a hatred of the Iga. Akeginu stains Gyoubu with blood, allowing Tenzen to track his movements and slay him with his sword. Only four ninja now remain on each side. On the border bridge between Owari and Mikawa, the Kouga discover the body of Gyoubu embedded within a wooden crate.
Episodes
- Ep. 11 · Kouga Strategy and Iga Pursuit Lead to Blinding and Death
- Ep. 12 · Hotarubi escapes Saemon while Nenki reports killing Gennosuke and the Kouga
- Ep. 13 · Nenki reveals his true identity as Saemon and kills Hotarubi before the group sails to Sunpu.
- Ep. 14 · Gennosuke's regrets and Tenzen's assault on Oboro lead to Gyoubu's secret intervention
- Ep. 15 · Tenzen slays Gyoubu on the ship, leaving four ninja remaining on each side.
- Ep. 16 · Flashback reveals the peaceful past of the Kouga and Iga clans before their conflict.
- Ep. 17 · Kouga retrieve a scroll from a hawk while Hyouma defeats Tenzen with his Dōjutsu.
- Ep. 18 · Lady Oeyo faces poison plot in Edo while Koshirou blinds Hyouma with whirlwind technique
- Ep. 19 · Koshirou is deceived by a voice and killed by Kagerou while Akeginu mourns.