Baba Yorichika , ? - 1546) was a samurai who lived during the Sengoku period of Japan. He was a retainer of the Shoni clan of western Kyushu, specifically Hizen Province. He was secretly contacted by a vengeful Ouchi Yoshitaka—who suffered from the power of the growing Ryuzoji Iekane, 17th and current head of the Ryuzoji clan, the Shoni's head retainer family—in 1544, who asked him to slay Iekane and desolate the Ryuzoji by all employable means. Consenting to this request, for the sake of his reputation, Yorichika used the reasoning that as Iekane was growing in power and, being retired, is subtle before any means of attack that could nullify his threat of independence from the Shoni, in order to assault the household of Iekane that same year. Yorichika killed Ryuzoji Chikaie—18th and current head of Ryuzoji—but was unable to bring down Iekane, who fled to Chikugo Province after such an unexpected incident of treachery. However, Yorichika's aspirations came to ruin the following year, as Iekane returned to Hizen with the backing of Kamachi Akimori, desolating Yorichika's forces and putting an end to his life, even though Iekane himself would die of old age the following year.