Ep. 1366: Rantaro and friends investigate rumors of Dokutake Castle's battle plans.
Aired on June 24, 2009

1366
Rantaro and his friends hear a rumor that Dokutake Castle is scheming for battle. Kirimaru comes up with a fundraising plan, and they head to the castle.
Episodes
- Ep. 1362 · Confident Takiyashamaru Realizes He Has No Friends
- Ep. 1363 · Yamada Sensei's Anxiety
- Ep. 1364 · Hayasugita leaves Hokitake Ninjas to study smokeless powder under Tada Dozen despite frequent errors
- Ep. 1365 · Shado-sensei reacts angrily to Ando-sensei's gloomy class description
- Ep. 1366 · Rantaro and friends investigate rumors of Dokutake Castle's battle plans.
- Ep. 1367 · The Kunoichi Trio Ask Isuke for Help With Cleaning
- Ep. 1368 · Danzo visits Rankiryu Dojo to improve his poor handwriting with Kirimaru accompanying him.
- Ep. 1369 · The pottery created by the previous head of the clan
- Ep. 1370 · Doi-sensei's birthday