Ninku

The story follows Fūsuke, a peculiar but skilled 12-year-old warrior from the Ninku school-a martial arts style blending ninjutsu and karate. Known as "Fūsuke of the wind," he was once the leader of the 1st Ninku corps, a group formed to fight against an oppressive empire that hunted those who practiced Ninku. The corps' leaders were named after the twelve Chinese zodiac animals and called "Etonin" (zodiac Ninku masters). After the war, the Ninku were nearly wiped out, deemed too dangerous and expendable by the rulers. Three years later, Fūsuke and his gassy penguin companion, Hiroyuki, set out to find the remaining Ninku captains.