For the kids Starring Katori Shingo from Japanese boys to men pop band fame - SMAP, this movie is aimed directly at the immature audience. That said just because you enjoyed movies such as Ace Ventura: Pet Detective, it doesn't mean you'll like this one. I imagine its more along the lines of the recent Spy-Kids series, which were immensely popular. The story is typical Hollywood fare, even though it's not a Hollywood movie. What happens when a young bullied elementary kid suddenly is the master of a great if somewhat naive ninja? If you can't guess maybe this is the movie for you. Based on the comic book and Japanese television animation series - Ninja Hattori-kun, I'd like to say that it has kept the spirit of those alive but having neither read nor seen the aforementioned I wouldn't know and after having seen this movie I also had no desire to. It's not a completely dull movie and Shingo has the charisma to make the character charming for those under 10.