Yama Onna Kabe Onna (山おんな壁おんな, roughly meaning "mountain woman, wall woman") is a Japanese manga series by Atsuko Takakura serialized in the seinen manga magazine Evening, published by Kodansha. A Japanese television drama adaptation aired on Fuji Television channels. The manga did not sell well until the television series began.

Working at a department store, Megumi Aoyagi (wall woman) is a career woman who is popular at her workplace. However, she carries an inferiority complex with regard to her flat chest. One day, a well endowed, well proportioned lady known as Marie Mariya (mountain woman) appears before her. In the middle of the episode, these two characters found friendship in each other.

Marie Mariya (mountain woman), although found strange by her co-workers for her big appetite and cheerful personality, Marie has an extraordinary way to pacify and please a dissatisfied customer. While Megumi Aoyagi (wall woman), saves the day with her smarts in making the sale.

With breasts and personalities at opposites of each other, despite the rivalry that emerged between the two, but, the multitudes of difficulties that lie in their paths won't get them down as they cheerfully and diligently go about their work and love life.