Ninpuu Kamui Gaiden: Tsukihigai no Maki

Kamui is a ninja from the Edo period who has decided to leave his clan. After doing so he is pursued relentlessly by the members of his former clan; who consider him to be a traitor and therefore wish to kill him. Kamui then wanders around Japan to escape from them by using his intelligence and great abilities to survive. In the course of the series Kamui begins to suffer from paranoia because of his status as a persecuted man. Kamui then started to believe that everybody wished to murder him and became distrusting of everyone he came across.

A young boy named Jiro finds his mother and sister murdered in his home. Falsely accused of the crime, he flees from his village and meets a priest named Tenkai, who has him kill a rogue ninja named Tarouza. After fulfilling that task, Jiro undergoes training to become a master assassin. Many years later, Jiro finds out that he was an orphan and his real father was Tarouza, who had worked for Tenkai until he aborted his mission when he fell in love with an Ainu woman. The young ninja discovers that the Shogunate was to retrieve the lost treasure of Captain Kidd and use it to once again isolate Japan from the rest of the world. Using the clues that Tarouza had kept secret, Jiro - along with the female ninja Oyuki and a slave named Sam - travels to Russia and America to search for the treasure in hopes of using it to extract revenge from Tenkai.

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Higan is a Nukenin - a former ninja who escaped his clan and is hiding from his violent past in rural America with his family. One night, he is ambushed by a team of assassins from his former organization who exact a bloody retribution on Joe and his family for betraying their ancient code. Rising from his seeming “death,” Joe will re-emerge as his former self - Ninja Kamui - to avenge his family and friends. Kamui is a 21st century ninja, a shadowy anachronism who pits his ancient skills against high-tech weaponry with brutal finesse. He must face off against trained assassins, combat cyborgs, and rival ninjas to bring down the very clan that made him.