Sugamo Prison was a prison in Tokyo, Japan. It was located in the district of Ikebukuro, which is now part of the Toshima ward of Tokyo, Japan.

Ikebukuro is a commercial and entertainment district in Toshima, Tokyo, Japan. Toshima ward offices, Ikebukuro station, and several shops, restaurants, and enormous department stores are located within city limits. It is considered the second largest adult entertainment district in Tokyo.