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Zenzo Hattori (服部 全蔵)Birthday: August 22
Height: 175 cm
Weight: 59 kg
A highly skilled ninja who sports a light-brown/dark-blonde mop top and a goatee. He is first introduced in episode 37, when he and Gintoki attempt to fight to the death over the last remaining issue of the Christmas Double Issue Jump, which in fact, was actually the Christmas Double Issue AKAMARU Jump. (in fact, he first appeared in episode 36 as the conman dreamcatcher's assistant). Apparently, he used to be from the Oniwabanshu too, and is acquainted with Ayame. He is the first ninja in the series to apparently equal Gintoki's skill and obsessive devotion to Jump. He apparently suffers from hemorrhoids. He commands a freelance ninja team known as the "Shinobi 5." His father is said to be the strongest man in the Oniwanbanshu, and an instructor to many of his peers, including Ayame Sarutobi.
His name is roughly based on a famous ninja from Iga, Hattori Hanzou.