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Season guide

Ninja Boy Rantaro: Season 6

131 episodes Premiered Apr 19, 2004 Updated Sep 25, 2026

Previously on Ninja Boy Rantaro

Season 6 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

⚡ Directly follows the overarching narrative developments of Ninja Boy Rantaro Season 5.
⚡ Faction dynamics and core character alliances shift under escalating external stakes.
⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
⚡ Sets up serialized story arcs that build directly toward the climactic season finale.

Season 6 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 6 Progress Shield

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Season 6: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

98%

Mytharc (3): Crucial lore & season climaxes

Core (128): Character development & subplots

Side Quest (0): Standalone / filler

S6·E1 Mytharc

Nanba's Sorcery

Apr 19, 2004 · 30 min

S6·E2 Core

The Gun Powder has been Stolen

Apr 20, 2004 · 30 min

S6·E3 Core

Rescue Shouzaemon

Apr 21, 2004 · 30 min

S6·E4 Core

The training under Teacher Matsuchiyo

Apr 22, 2004 · 30 min

S6·E5 Core

Capture of the Ape

Apr 23, 2004 · 30 min

S6·E6 Core

Mass Pumpkins

Apr 26, 2004 · 30 min

S6·E7 Core

Battle at the Sakura Valley

Apr 27, 2004 · 30 min

S6·E8 Core

Ancient ninja techniques

Apr 28, 2004 · 30 min

S6·E9 Core

Fuuma's Scoundrel

Apr 29, 2004 · 30 min

S6·E10 Core

The Terror of the Ninja School

Apr 30, 2004 · 30 min

S6·E11 Core

The Canteen's Menu

May 3, 2004 · 30 min

S6·E12 Core

Fear of the School

May 4, 2004 · 30 min

S6·E13 Core

Pleasant field trip

May 5, 2004 · 30 min

S6·E14 Core

Kirimaru's Investigation

May 6, 2004 · 30 min

S6·E15 Core

Duel with Yamabuki

May 7, 2004 · 30 min

S6·E16 Core

Imposter Rikichi

May 10, 2004 · 30 min

S6·E17 Core

Idling

May 11, 2004 · 30 min

S6·E18 Core

Rikichi's Injury

May 12, 2004 · 30 min

S6·E19 Core

Happousai and Hariko's Horse

May 13, 2004 · 30 min

S6·E20 Core

Happousai and Hariko's Horse

May 14, 2004 · 30 min

S6·E21 Core

Kamoko's "Cannot, cannot, cannot"

May 17, 2004 · 30 min

S6·E22 Core

Want to eat Tendon

May 18, 2004 · 30 min

S6·E23 Core

The wind ogre and the rain ogre and the pigeon

May 19, 2004 · 30 min

S6·E24 Core

Cleaning of the Grave of Kinrakuji

May 20, 2004 · 30 min

S6·E25 Core

Substitute, Shibei

May 21, 2004 · 30 min

S6·E26 Core

New Leader

May 24, 2004 · 30 min

S6·E27 Core

Would like to eat Unagi

May 25, 2004 · 30 min

S6·E28 Core

Delicious Riceballs

May 26, 2004 · 30 min

S6·E29 Core

The Library Member

May 27, 2004 · 30 min

S6·E30 Core

Combined Training

May 28, 2004 · 30 min

S6·E31 Core

Tasty Rakkuu

May 31, 2004 · 30 min

S6·E32 Core

Journey to Kinrakuji

Jun 1, 2004 · 30 min

S6·E33 Core

Arrival of Battenbou

Jun 2, 2004 · 30 min

S6·E34 Core

Rival Tatsumaki

Jun 3, 2004 · 30 min

S6·E35 Core

Happousai's Satue

Jun 4, 2004 · 30 min

S6·E36 Core

Want to go fishing with Father

Jun 7, 2004 · 30 min

S6·E37 Core

Typhoon comes

Jun 8, 2004 · 30 min

S6·E38 Core

The Big Shark came out

Jun 9, 2004 · 30 min

S6·E39 Core

Dejection of Shinbei

Jun 10, 2004 · 30 min

S6·E40 Core

I want an Excellent Blade

Jun 11, 2004 · 30 min

S6·E41 Core

Rebellion of the First=year group

Jun 14, 2004 · 30 min

S6·E42 Core

Midnight Part-time Job

Jun 15, 2004 · 30 min

S6·E43 Core

Tailing Investigation

Jun 16, 2004 · 30 min

S6·E44 Core

Kirimaru plays traunt

Jun 17, 2004 · 30 min

S6·E45 Core

As for such an expectation

Jun 18, 2004 · 30 min

S6·E46 Core

The Adminstrator's Mistake

Jun 21, 2004 · 30 min

S6·E47 Core

Transfer Class of the Principal

Jun 22, 2004 · 30 min

S6·E48 Core

Oshige-chan is bad

Jun 23, 2004 · 30 min

S6·E49 Core

Part-time Job is Kunou

Jun 24, 2004 · 30 min

S6·E50 Core

Hide the Namekuji

Jun 25, 2004 · 30 min

S6·E51 Core

Invitation to the Swordsman

Jun 28, 2004 · 30 min

S6·E52 Core

The Gutsy Salesman

Jun 29, 2004 · 30 min

S6·E53 Core

Reveal your True Identity!

Jun 30, 2004 · 30 min

S6·E54 Core

Ryuuoumaru's Vessel

Jul 1, 2004 · 30 min

S6·E55 Core

Grandmother's Gratitude

Jul 2, 2004 · 30 min

S6·E56 Core

In order to become an excellent ninja

Jul 5, 2004 · 30 min

S6·E57 Core

The Warship has been Taken

Jul 6, 2004 · 30 min

S6·E58 Core

Dispatch the Employees

Jul 7, 2004 · 30 min

S6·E59 Core

Magic vs Magic

Jul 8, 2004 · 30 min

S6·E60 Core

The Health Administrators' Report

Jul 9, 2004 · 30 min

S6·E61 Core

Listen to what is said

Jul 12, 2004 · 30 min

S6·E62 Core

Shibuki's New Frustrations

Jul 13, 2004 · 30 min

S6·E63 Core

The Entry of Boutai's Disciples

Jul 14, 2004 · 30 min

S6·E64 Core

The Pleasant Cooking

Jul 15, 2004 · 30 min

S6·E65 Core

The Wife that cannot be Seen

Jul 16, 2004 · 30 min

S6·E66 Core

Coach of Dokutake's Naval Army

Jul 19, 2004 · 30 min

S6·E67 Core

Yuki runs

Jul 20, 2004 · 30 min

S6·E68 Core

The Rescue Restriction

Jul 21, 2004 · 30 min

S6·E69 Core

I can also become

Jul 22, 2004 · 30 min

S6·E70 Core

Welcome back

Jul 23, 2004 · 30 min

S6·E71 Core

Ninja Recruitment

Jul 26, 2004 · 30 min

S6·E72 Core

The Mysterious Employer

Jul 27, 2004 · 30 min

S6·E73 Core

Everyone's Failure

Jul 28, 2004 · 30 min

S6·E74 Core

The True Character of Ninjas?

Jul 29, 2004 · 30 min

S6·E75 Core

Who is the Criminal!

Jul 30, 2004 · 30 min

S6·E76 Core

Kingo is not around

Aug 2, 2004 · 30 min

S6·E77 Core

What if he is not the Predistined Rival

Aug 3, 2004 · 30 min

S6·E78 Core

The Reason for the Duel

Aug 4, 2004 · 30 min

S6·E79 Core

Nametarou's Rebellious Stint

Aug 5, 2004 · 30 min

S6·E80 Core

The Capabilities of a Real Battle

Aug 6, 2004 · 30 min

S6·E81 Core

Shibuki's Worries

Aug 9, 2004 · 30 min

S6·E82 Core

Expelled from the Medical Room

Aug 11, 2004 · 30 min

S6·E83 Core

Protect the Principal

Aug 17, 2004 · 30 min

S6·E84 Core

The Excessive Appetite of Teacher Tobe

Aug 18, 2004 · 30 min

S6·E85 Core

The Ideal Ninja

Aug 19, 2004 · 30 min

S6·E86 Core

Afterall, he is the Master

Aug 20, 2004 · 30 min

S6·E87 Core

Happousai leaves home

Aug 23, 2004 · 30 min

S6·E88 Core

The Training of the Hijyoujyuu

Aug 24, 2004 · 30 min

S6·E89 Core

The Monk who was Deceived

Aug 25, 2004 · 30 min

S6·E90 Core

The Discrimination of the Ninja

Aug 26, 2004 · 30 min

S6·E91 Core

Protect Uraurayama

Aug 27, 2004 · 30 min

S6·E92 Core

The Theft of the Infamous Sword

Aug 30, 2004 · 30 min

S6·E93 Core

The Storage Room of Futokoroya

Aug 31, 2004 · 30 min

S6·E94 Core

The Swordsman, Hattari

Sep 1, 2004 · 30 min

S6·E95 Core

The Fight under the Edge

Sep 2, 2004 · 30 min

S6·E96 Core

The Shadow of the Infamous Sword

Sep 3, 2004 · 30 min

S6·E97 Core

The Selfish Dinner

Sep 6, 2004 · 30 min

S6·E98 Core

Even though Dinner has been Eaten

Sep 7, 2004 · 30 min

S6·E99 Core

Going through Strict Prohibition together

Sep 8, 2004 · 30 min

S6·E100 Core

Takiyashamaru's Flu

Sep 9, 2004 · 30 min

S6·E101 Core

Let's go and eat Dinner

Sep 10, 2004 · 30 min

S6·E102 Core

It's Better to be Kind

Sep 13, 2004 · 30 min

S6·E103 Core

The Opening of the Unagi Shop

Sep 14, 2004 · 30 min

S6·E104 Core

Mutual

Sep 15, 2004 · 30 min

S6·E105 Core

The Person who is Visible

Sep 16, 2004 · 30 min

S6·E106 Core

The Constitution of Onigumomaru

Sep 17, 2004 · 30 min

S6·E107 Core

Without the Shuriken

Sep 20, 2004 · 30 min

S6·E108 Core

Lunch at the Battle Place

Sep 21, 2004 · 30 min

S6·E109 Core

Mr Ryuuoumaru

Sep 22, 2004 · 30 min

S6·E110 Core

The Love Letter that cannot be Reached

Sep 23, 2004 · 30 min

S6·E111 Core

Return to Fuuma

Sep 24, 2004 · 30 min

S6·E112 Core

Shadowing of the Married Couple

Sep 27, 2004 · 30 min

S6·E113 Core

The Outstanding Upper-class Student

Sep 28, 2004 · 30 min

S6·E114 Core

The Disqualified Leader

Sep 29, 2004 · 30 min

S6·E115 Core

The Creation of Dokutakekunou

Sep 30, 2004 · 30 min

S6·E116 Core

The Prophetic Dream

Oct 1, 2004 · 30 min

S6·E117 Core

Sarasarahea

Oct 4, 2004 · 30 min

S6·E118 Core

Shinbei's Hair

Oct 5, 2004 · 30 min

S6·E119 Core

The True Identity of Rinsu

Oct 6, 2004 · 30 min

S6·E120 Core

Lord of the Lost Child

Oct 7, 2004 · 30 min

S6·E121 Core

The Delicious Training

Oct 8, 2004 · 30 min

S6·E122 Core

The New Deshiro

Oct 11, 2004 · 30 min

S6·E123 Core

Various Set-Ups

Oct 12, 2004 · 30 min

S6·E124 Core

The True Identity of Deshiro

Oct 13, 2004 · 30 min

S6·E125 Core

The Blast of Deshiro

Oct 14, 2004 · 30 min

S6·E126 Core

The Destroyed Deshiro

Oct 15, 2004 · 30 min

S6·E127 Core

The Special Lunch

Oct 18, 2004 · 30 min

S6·E128 Core

Fishing in the Open Sea

Oct 19, 2004 · 30 min

S6·E129 Core

Hyoudayuu's Color Chestnut

Oct 20, 2004 · 30 min

S6·E130 Mytharc

Bontenmaru is a Bad Person

Oct 21, 2004 · 30 min

S6·E131 Mytharc

The Dream of the First-year Class

Oct 22, 2004 · 30 min