Kojiro's Betrayal!?

Chronology
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Episode 15
275px
Information
Title:	Kojiro’s Betrayal!?
Japanese Title:	小次郎が裏切った！？ (Kojirō ga uragitta!?)
Original airdate:	July 16, 1993
Manga source:	Volume 6: Files 6-8 (055-057)
Story
Cast:	Yaiba Kurogane Sayaka Mine Takeshi Onimaru Shonosuke Kagetora Musashi Miyamoto Gerozaimon Geroda Kojiro Sasaki Kumo-Otoko Ana Shioji Namako-Otoko Dorai Dorai Raizo Mine Shizuka Mine Sayaka's Grandmother Tortoise Europa
Staff
Director:	Kunihiko Yuyama (chief) Norihiko Sudo
Screenplay:	Kenji Terada
Storyboard:	Akitaro Daichi
Episode director:	Akitaro Daichi Kazuya Murata (asst.)
Animation director:	Muneyoshi Fujita
Voice Cast: Minami Takayama as Yaiba Kurogane Kotono Mitsuishi as Sayaka Mine Ryo Horikawa as Takeshi Onimaru Masaharu Sato as Musashi Miyamoto Tetsuo Sakaguchi as Kumo-Otoko Jurota Kosugi as Kojiro Sasaki Kazunari Tanaka as Gerozaimon Geroda Tsutomu Kashiwakura as Namako-Otoko Mami Matsui as Ana Shioji Tessho Genda as Dorai Dorai
Music
Opening song:	Yūki ga Areba
Closing song:	Shinchigakunaki Tatakai

Characters introduced

Tortoise Europa
100px	aka Kumonga Z Mecha Turtle operated by Kumo-Otoko Fourth of the Four Heavenly Kings

Cast

Characters
Yaiba Kurogane Sayaka Mine Takeshi Onimaru Kagetora Shonosuke Musashi Miyamoto Kojiro Sasaki Gerozaimon Geroda Kumo-Otoko 100px Dorai Dorai Ana Shioji Namako-Otoko Raizo Mine Shizuka Mine Sayaka's Grandmother

Plot

Resolution

  Show spoilers »

Trivia

• While introducing himself to Dorai Dorai, Yaiba recites the first eight decimals of the Square root of 2 (1.41421356) and the first seven of the Square root of 5 (2.2360679), which has to be remembered by all Japanese students. The fact that they have to remember the first digits of a square root is also shown in The Marriage Registration's Password.

See also

• Yaiba