A young production assistant at Musashino Animation. One of Aoi's seniors (by one month) in the production department, Tarou is generally a useless and incompetent employee, because he's a bumbling, airheaded fool who always forgets things and doesn't listen to advice, as he has a very inflated notion about himself.

According to series director Tsutomu Mizushima, Tarou is a caricature of his younger self.