aru, an orphaned American who washes ashore in Japan and is mistaken for the great White Ninja of legend. Raised among the finest Ninjas, Haru grows strong and big - very big. With the grace of all Three Stooges rolled into one body, Haru is an embarrassment to his clan. But when a beautiful blonde pleads for his help, Haru is given one dangerous, disastrously funny chance to prove himself.

Overview from themoviedb.org