Book Off
Major Japanese second-hand bookstore chain, also dealing in used games, CDs, DVDs.
Last updated October 18, 2026
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Overview
Book Off is a well-known Japanese second-hand goods retailer, starting with used books and expanding to games, music, and video. Its business model features bulk purchasing and rapid turnover, with many stores in Japan and abroad.
Products and positioning
Mid-to-low-end secondhand goods market, emphasizing value for money and convenience.
Product categories. Secondhand books · Secondhand games · Secondhand CDs · Secondhand DVDs · Secondhand toys
Controversies
2026
BOOKOFF discloses member-system breach
BOOKOFF announced that a third party had breached its member system, resulting in the leak of 6,427,735 user records involving 6,383,279 people. The potentially exposed information included personal details and hashed password data. The company disclosed the incident as a controversy note concerning the unauthorized access and the resulting data exposure.
Recent events
BOOKOFF discloses member-system breach[1]
Reported:
BOOKOFF announced that a third party had breached its member system and that 6,427,735 user records, involving 6,383,279 people, were leaked. The potentially exposed information included personal details and hashed password data.
Sources1 sources
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