Set in 1932, amid the rise of militarism after the establishment of the Manchukuo colony in Northeast China, the story centers on a trio of karateka. Studying under their aging master in a small dojo in the woods of central Kyushu, Choei, Taikan and Giryu face a company of kempeitai military police come to requisition their dojo for use as a military base.
Black Belt, known as Kuro-obi (黒帯) in Japan, is a 2007 Japanese martial arts drama film directed by Shunichi Nagasaki. It focuses mainly on the martial art of karate. It is notable for excluding the usual exaggerations of the genre. The lead roles were played by karate experts, and no special effects were used. In the film, three students of an elderly karate master decides among themselves on who deserves their master's black belt.