Isamu Bito

Isamu Bito (尾藤 勇), also known as Sam (サム) is a stallholder and an old client of Sokichi Narumi. He has a habit of flicking people painfully in the face with his hand when they say something that annoy him, which he often performed on Shotaro. Ten years ago, Bito took the heat for an armored car robbery involving the "Beastman", actually his employee Maruo Arima and Suzuko Arima, a woman he had feelings for. However, after the case is solved, Bito continues with his job.

Bito appears in Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core, where he owns a stall selling pinwheels in the year 1999. Bito introduces Sokichi to Stone to help him solve the "Spider Man" case.

Isamu Bito is portrayed by Kazuyoshi Ozawa (小沢 和義).