Bamboo BladeBamboo Blade.

Bamboo Blade (stylized as BAMBOO BLADE) is a Japanese manga series written by Masahiro Totsuka and illustrated by Aguri Igarashi. It was serialized in Square Enix's Young Gangan magazine from December 2004 to September 2010. The series tells the story of Toraji Ishida, a luckless high school Kendo instructor, who is challenged by his former upperclassman, also a kendo instructor, to a competition between their female students.