Garaiya

…Also called Jiraiya. Originally, it was a character from a Chinese novel called Garaiya, a thief who would leave the inscription “I have come” in the houses he attacked. When the Jiraiya Monogatari, a reading book adapted from the novel, was published, the concept of the phantom monster became very popular, and the image of Jiraiya, who used the magic of a toad to fight against authority, was widely established in the common people’s world from the end of the Edo period to the Meiji period, through the use of the Jiraiya storybook and kabuki plays. …

*Some of the terminology explanations that mention "Garaiya" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…〈自来也〉とも。もとは中国の小説に登場する〈我来也（がらいや）〉で，襲った家には，〈我来也（われきたれるなり）〉と書き残す盗賊。これを翻案した読本《自来也説話（じらいやものがたり）》が出版されるや幻怪の構想が大いに人気を得，やがて合巻や歌舞伎などによって，蝦蟇（がま）の妖術を駆使して権力に立ち向かう児雷也像が，幕末から明治にかけての民衆世界に広く定着した。…

※「我来也」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報