(from ebookjapan):
One day, two brothers are on their way to a public bath when they are attacked by a statue of a wrestler at a temple. The case is solved by a boy riding a pocket bike, Detective Pocketbike. Although he is only a child, he shows his deductive reasoning and discovers the true nature of the case! (from "Rikishi Statue Moves") and many other difficult cases. Mystery manga by Shinichi Koga, one of Japan's leading occult and horror creators.