Otowa Hankichi is a member of the shogunate secret police who appears in the Samurai Champloo episode Bogus Booty. He is voiced by Shoutarou Morikubo in the original Japanese version and voiced by Dave Wittenberg in the English dub.
Hankichi is one of several people working for the shogunate and attempting to uncover a currency-counterfeiting ring. He is a ninja with a large mole on his left cheek, and he is also good at smithing work, so he is hired by the counterfeiting ring a year before the present to sculpt fake koban. Below the brothel is an underground foundry where he works. The counterfeiting ring finds out about his double life and the ninjas chase after him into a forest. Hankichi tries to escape with some of the counterfeit koban, but he tosses the fake money into a nearby river and eventually gets captured.
The ninjas capture Hankichi and bring him back to the underground foundry and torture him with no results. They bring him back upward to Ginsa, the head of the forgery ring. Ginsa orders him to be killed along with the other shogunate spies, but Hankichi is saved from death when his partner Yatsuha convinces Mugen to beat up the guards throughout the brothel. After Ginsa and his cronies are arrested, Hankichi helps Yatsuha drag Mugen to a tree so that his friends can find him. As the two of them leave the city, Hankichi is shocked that Yatsuha wants to marry Mugen.