| Type | Business corporation |
|---|---|
| Industry | Publishing |
| Founded | 1915 |
| Headquarters | Tokyo, Japan |
| Key people | Hachiman Sueatsu (八幡 統厚), President |
| Products | Dictionaries, textbooks and other publications |
| Employees | 160 (2006) |
| Website | http://www.sanseido-publ.co.jp/ |
Sanseidō Co., Ltd. (株式会社三省堂 Kabushiki-gaisha Sanseidō) is a Japanese publishing company known for publishing dictionaries (such as Shin Meikai Kokugo Jiten) and textbooks.