Kidoumaru

…He was one of the powerful retainers of Minamoto no Yorimitsu, and was called one of the four heavenly kings of Yorimitsu along with Sakata no Kintoki, Taira no Sadamichi, and Taira no Suetake. [Akira Otsuka]
[Stories and legends]
In the ninth volume of the Kokin Chomonshu, there is a story about defeating the ultimate owarai (child of great age) named Onidōmaru, who was targeting Minamoto no Yorimitsu, and in the Sword Scroll of the Yashiro version of the Tale of the Heike, there is the following story: Tsuna met a beautiful woman on the Modoribashi Bridge of the Ichijo Horikawa River and accompanied her, but at the Gojo Ferry she transformed into a demon.

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…源頼光の有力な郎党で，坂田公時，平貞道，平季武とともに頼光四天王とよばれる。【大塚 章】
［説話と伝説］
　《古今著聞集》巻九に源頼光をねらう鬼同丸という究竟の大童（おおわらわ）を討つ話があり，屋代本《平家物語》剣巻には次のような話がある。綱が一条堀河の戻橋で美女にあい同道すると，五条の渡しで鬼に変じた。…

※「鬼同丸」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