# Sanseido Bookstore Ikebukuro closure

> Live situation record from CLSTR: https://clstr.news/situations/sanseido-bookstore-ikebukuro-closure
> Updated: 2026-09-12T22:44:06.000Z. Sources: 4. Developments: 2.

Sanseido Bookstore Ikebukuro Main Store has announced its permanent closure, effective December 31, 2026. The large-scale retailer, located in the Seibu Ikebukuro building, has been winding down operations in stages. 

Following the closure of the B1 and 1st floors of the Book Building in October 2024, the store transitioned to operating only within specific zones of the Annex B1 level. At its peak, the establishment housed approximately 800,000 volumes across a 3,300 square meter sales area.

## Timeline

### 2026-09-12: Seiseki-Sakuragaoka Keio Store to close for renovation

Keio Store's food floor at Seiseki-Sakuragaoka Shopping Center will close for renovation from September 14–30, 2026. Keio Atman will also run a local food points promotion during this period.

2 sources. https://clstr.news/cluster/seiseki-sakuragaoka-keio-store-to-close-for-renovation

### 2026-09-04: Sanseido Bookstore Ikebukuro Main Store to close in 2026

Sanseido Bookstore Ikebukuro Main Store will close on December 31, 2026, following an 11-year history at the Seibu Ikebukuro location. Phased closures of specific floors begin in October 2024.

2 sources. https://clstr.news/cluster/sanseido-bookstore-ikebukuro-main-store-to-close-in-2026

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Cite as: Sanseido Bookstore Ikebukuro closure. CLSTR, https://clstr.news/situations/sanseido-bookstore-ikebukuro-closure