- Yo-kai Watch Shadowside anime: Minor Yo-kai
- M05: Minor Yo-kai.
- Yo-kai Watch Wibble Wobble: Playable Yo-kai.
- Yo-kai Watch 4: Playable Yo-kai .
Genbu is the Kenbumajin who wields the Genbu Hotenfu (Japanese: ゲンブ法天斧 Genbu Hōtenfu). He wears green samurai armor with a purple and yellow haori-like overcoat. His hair is a purplish brown. His eyes' irises are yellow and his sclera is dark blue. On his left arm and hovering on the right side is a white snake.
In his Genjuu form, Genbu is a giant green tortoise, giant branches grown from his head that resemble horns and vines that resemble a beard, his mossy black shell seems to be surrounded by fog that has the shape of a white snake.
Genbu is usually a serious character, but he has the tendency to get excited when chopping things.
Genbu can fly and his axe can easily slice anything in half, even attacks. He is also able to manipulate water, as seen by his Soultimate.
Yo-kai Watch Wibble Wobble
Yo-kai Watch Shadowside
Genbu debuts in SS031, where he sets a bunch of trials for the main cast to go through, which they survive. Before they could grab his axe, he materialized himself and challenged the group to a fight. Suzaku prompts Touma to transform into his Kenbumajin form and ends up getting Genbu to make a deal with the team, challenged to cut Jorogumo's webs.
In the next episode, he tries to cut the webs of Jorogumo but fails, getting taunted by the spider Yo-kai in the process. He then gets serious and uses up all his energy to perform his Soultimate move, successfully chopping through the webs but forcing Touma to revert.
In SS045, Touma uses him to chop down Byakko's bamboo forest to stop the tiger Yo-kai from hiding, but the bamboos regrow quickly afterwards. He later sustains several attacks form Byakko and his clone before being defeated.
Yo-kai Watch: Wibble Wobble
Genbu is the Japanese name of the Black Tortoise of the North, which is one of the Four Symbols based on mythological creatures in the Chinese constellations. It represents the north and the winter season.
In SS031, Akinori mentions that Genbu was always shown as a tortoise.
- In Yo-kai Watch: Forever Friends, Genbu used to be a pet tortoise belonging to Shin before Susanoo turned him into his Genjuu form.
- Genbu's Genjuu form was first released via Wibble Wobble, making him the only Genjuu to debut in this manner. Suzaku's debuted in the anime, Byakko's debuted via a leak regarding him and Fudou Myouou and Ashura's are still unknown. Kyryn also debuted in the anime, while Souryuu debuted in Yo-kai Watch 4.
- Genbu does not garb his weapon during his summoning animation. Instead, he swings it forward.