Ep. 16: Flashback reveals the peaceful past of the Kouga and Iga clans before their conflict.
Aired on July 27, 2005

16
A flashback depicts the Kouga and Iga clans during their era of peace. The Second Hattori Hanzo questions why Kouga Danjo and Iga Ogen selected their young relatives, Gennosuke and Oboro, as successors instead of more qualified candidates. The narrative shows Gennosuke and Oboro interacting as children and later as young adults. During this time, Gennosuke harbors a dream to eliminate the animosity between the two clans. This sequence provides context for the succession choices made by the clan leaders and highlights the early relationship between the two chosen heirs.
Episodes
- 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.
- Ep. 20 · Saemon Disguises as Tenzen to Rescue Kagerou from Akeginu