Azumi.

About Azumi

Azumi (あずみ) is a Japanese manga series written and illustrated by Yū Koyama. It was serialized in Shogakukan's seinen manga magazine Big Comic Superior from 1994 to 2008, with its chapters collected in 48 tankōbon volumes. A sequel series with the same title was serialized in the same magazine from 2008 to 2014, with its chapters collected in 18 tankōbon volumes. The story follows the title character, a young woman, brought up as part of a team of assassins charged with killing the warlords that threaten the uneasy peace in Feudal Japan in the aftermath of its long Sengoku civil war period.