Ninja Hattori is an animated comedy where a little boy called Ken befriends an equally little Ninja called Hattori. Hattori though small in size is not any less powerful than any supreme Ninja. He can move at high speed, sleep suspended on the ceiling and knows martial arts like the back of his superfast hand. Hattori is hardworking, conscientious and quite strict when it comes to disciplining Ken. But he has a heart of gold and is always there to rescue Ken from any difficult situations.

The Ninja Hattori Nin X Nin live action series is the tale of the little Ninja Kanzo Hattori's attempt to attain Ninjahood and take up responsibilities from his aging father Ninja, Jinzo. Kanjo Hattori is faced with the challenge of hiding his Ninja identity as he serves Ken-ichi the elementary school kid.