Microsoft Japan
| Headquarters in Minato, Tokyo | |
| Microsoft Japan | |
| Native name | 日本マイクロソフト株式会社 | 
| Romanized name | Kabushiki-gaisha Nihon Maikurosofuto (K.K. Microsoft Japan Company) | 
| Formerly | Microsoft Company, Ltd. (1986–2011) | 
| Company type | Subsidiary | 
| Industry | |
| Predecessors | ASCII Microsoft | 
| Founded | February 1986 in Yoyogi, Shibuya | 
| Founder | 
 | 
| Headquarters | , Japan | 
| Key people | Susumu Furukawa, President (1986 - 1992) 
 | 
| Number of employees | 2,225 (2013) | 
| Parent | Microsoft | 
| Website | www.microsoft.com/ja-jp/ | 
| Native name | マイクロソフト ディベロップメント | 
|---|---|
| Founded | November 16, 2005 | 
| Founder | Bill Gates | 
| Headquarters | Chōfu, Tokyo, Japan | 
| Key people | Shunichi Kajisa, President and Representative Director | 
| Number of employees | 371 (2006) | 
| Website | www.microsoft.com/ja-jp/ | 
Microsoft Japan Co., Ltd. (also known as MSKK) is a Japanese subsidiary of Microsoft headquartered in Minato, Tokyo. It develops both hardware and software technologies for consumers and business partners.
Microsoft Japan was founded in February 1986 as Microsoft Company, Ltd. by Susumu Furukawa and Bill Gates after partnership between ASCII Corporation and Microsoft ended, with the remaining ASCII Microsoft operations being merged into ASCII.