B. Ichi (B壱) is a Japanese manga written and illustrated by Atsushi Okubo. It was serialized in Monthly Shōnen Gangan from 2001 to 2002 and was was collected in four bound volumes, released by Square Enix in Japan. The manga was licensed for distribution in North America by Yen Press and released in English from 2008 to 2009. Okubo then went on to create his more popular series Soul Eater.