The Magic Serpent

'Great Dragon Battle') is a 1966 kaiju film directed by Tetsuya Yamanochi and produced and distributed by Toei Company, loosely adapting the Japanese story of Jiraiya.

[1][2] The Oumi Kingdom, ruled peacefully by Lord Ogata (Shinichiro Hayashi), was raided by his corrupt general Daijo Yuki (Bin Amatsu), who was assisted by an evil ninja named Orochimaru (Ryūtarō Ōtomo), who slew the lord and his wife, who in turn trusted their young son Ikazuchi-Maru to their soldiers, who escaped the kingdom in a small boat.

Years later, Ikazuchi-Maru (Matsukata Hiroki), now a young man, has mastered the art of ninjutsu and toad magic, thanks to an old hermit named Dojin Hiki (Nobuo Kaneko).

Before setting out on his mission to avenge his master, Ikazuchi-Maru says farewell to Tsunade, who is taken care of by an old "spider" woman (Sen Hara), who tells her to follow the young man.

The course of Ikazuchi-Maru's journey has him befriending a girl named Saki (Yumi Suzumura) and her little brother Shirota (Takao Iwamura), whose village was oppressed by Daijo Yuki's men.