In Japan

General

• Amazon
• Books　　　Japan Book Publishers Association
• Fujisan.co.jp　　　General magazines. Filtered by genre at "カテゴリ一覧" or searchable by keyword.
• honto
• Bookstore Cross-Search　　　Includes secondhand bookstore (Book Town Jimbou Old Book Database, Super Genji, Nihon no Furuhon-ya Old Books Inventory Search)
• Government Publications （Official Gazette Co-operation of Japan）

2.Old books

• Book Town Jimbou Old Book Database
• Super Genji
• Nihon no Furuhon-ya Old Books Inventory Search

3.Old book catalogs

• Old Book Trade Catalog Search System （Chiyoda Public Library）　　　Meiji era- Showa era, approximately 10,000 items

4.Worldwide

General

• Amazon
• Books in Print （Bowker）　　　*Subscription database for on-site use only
• Ulrich's web　　　*Subscription database for on-site use only

5.Old books

• alibris
• viaLibri