The 16th place is acquired by Yahoo.co.jp. Yahoo! Japan Corporation is a joint venture between the American internet company Yahoo! and the Japanese internet company Softbank. Yahoo! Japan Corporation was formed in January 1996 and its first portal launched on April 1, 1996.

Yahoo! Japan was listed on JASDAQ in November 1997. In January 2000, it became the first stock in Japanese history to trade for more than ¥100 million per share. The company was listed on the Tokyo Stock Exchange in October 2003 and became part of the Nikkei 225 stock market index in 2005.

Yahoo! Japan was a founding member of Rakuten CEO Hiroshi Mikitani's Japan withdrew from the Japan Business Federation (Keidanren) in June 2011 and made moves to become the Japan Association of New Economy as a rival to Keidanren, Yahoo! Japan withdrew from the e-business association in March 2012. It joined Keidanren in July 2012.