A minor character, he is the successor to an udon shop. When Lawson visits the 20th century, Momiji goes to him to learn how to make udon (after having doubts about Yohko). He is the first person in 1999 AD to realize that Yohsuke was female when he saw the shape of Yohsuke's body in the rain. Although he has photographic evidence, he tries to force himself to believe that it was simply a delusion by making udon and then eating it.