Manyū Hiken-chō (魔乳秘剣帖, lit. "Magic Breast Secret Sword Scroll") is a Japanese manga series written and illustrated by Hideki Yamada. Set in a parallel version of the Taihei Edo period, the series follows Chifusa, a busty kunoichi learning to be samurai. The manga began serialization in Enterbrain's seinen manga magazine Tech Gian in 2005. An anime adaptation produced by Hoods Entertainment aired in Japan from July to September 2011.