Jiraiya (自来也 or 児雷也, literally "Young Thunder"), originally known as Ogata Shuma Hiroyuki (尾形周馬寛行), is the toad-riding protagonist of the Japanese folk tale Katakiuchi Kidan Jiraiya Monogatari (報仇奇談自来也説話, The Tale of the Gallant Jiraiya). The tale was originally a Yomihon that was published in 1806–1807, and was adapted into a serialized novel...