Mishaguji are snake-like gods in Japanese folktales.
In Touhou, Mishaguji are underlings of Moriya Suwako and have an appearance close to the mythology. They can be seen in Touhou Hisoutensoku during one of her super moves, where she summons them to assault the opponent in a manner similar to the Shun Goku Satsu. They also betrayed Yasaka Kanako when she seized Suwako's land in the distant past, blighting the region until Kanako agreed to keep Suwako as a co-deity. They are utterly loyal to Suwako and will answer to no one else, with the possible exception of Suwako's descendant, Kochiya Sanae.
In Megami Tensei, Mishaguji is a god of sexual intercourse and had a phallic shape, possibly similar to an earthworm.
