Ikebukuro

About
Ikebukuro (池袋), a part of Toshima ward, is a large commercial and entertainment district of Tokyo, Japan. It is the location of the Toshima ward offices, Ikebukuro station and several extremely large department stores.

At the center of Ikebukuro is the train and subway station, a huge urban gathering shared by the JR East lines, the Seibu Ikebukuro Line and the Tōbu Tōjō Line. It is one of the main commuter hubs in the western Yamanote area of Tokyo. Ikebukuro Station is the second busiest station in Japan, second only to Shinjuku Station.

Shin Megami Tensei III: Nocturne
In Shin Megami Tensei III: Nocturne, Ikebukuro is where the Mantra Headquarters is located. The Mantra demons and their leader, Gozu-Tennou, are the rivals of Hikawa's Assembly of Nihilo. Later in the game the Mantra HQ is where the Reason of Yosuga is born.

Items
Ikebukuro: Mantra Headquarters:
 * Basement - Repulse Bell & Beads(x2)
 * Basement Prison - Mamudo Rock & Gaea Magatama
 * 2nd Floor - Chakra Pot
 * 3rd Floor - Bead & Power Incense
 * Top Floor - 3,000 Macca & Attract Pipe
 * West Wing of Ikebukuro (past the Mantra HQ) - Candelabrum of Eternity (Defeat Daisoujou)

Note: The bold items can only be obtained during a full Kagutsuchi phase in treasure chests.