* First appearance: Battle 7
* Type: Sei
* Type: Katsujin Ken
* Martial Arts: Chinese martial arts soft style
Kensei is a 41-year-old, lecherous master of Chinese Kenpō. He is short, balding, and always tries to take revealing pictures of beautiful women (including Shigure and Miu), which often earns him the wrath of the pair, though it does not stop him. Despite his present attitude, he was actually a charming and handsome young man in his youth, and was very popular with women. Kenichi and Ma develop a very close relationship, though Ma mistreats Kenichi comically like everyone else does, Kenichi sees him as a father figure. He also knows Kenichi better than the others due to the fact that he is usually the one who ends up convincing him to cooperate with their plans, such as when he convinced Kenichi to move into Ryōzanpaku, and also will occasionally swindle him into buying the perverted pictures he takes (Though in the D&D arc, Kenichi states that he all he ever receives are pictures of Tochumaru posing). Though he is a perverted and sly old man, Kenichi still admits that he never doubted his training methods or his beliefs as a master, this shows how much his bond with Kenichi and him are as master and disciple.
Later in the series, he is revealed to have a wife and three kids, including a 16-year-old daughter named Renka Ma, who followed him from China. Kensei was actually the leader of an elite martial arts alliance in China, made up of thousands of students. However, he viewed the responsibilities as a nuisance, so he left it all to his wife, and moved to Japan where he operates an accupuncture clinic. He also has an older brother, Sougetsu Ma.
In the manga, his surname is pronounced Ba; in the anime, and in some translations of the manga, it is changed to Ma, possibly because this is the usual Chinese pronunciation.