is a Japanese internet company originally formed as a joint venture between the first incarnation of American internet company Yahoo! (later divested by Verizon into Altaba) and the Japanese company SoftBank. It is headquartered at Kioi Tower in the Tokyo Garden Terrace Kioicho complex in Kioicho, Chiyoda, Tokyo. Yahoo! Japan's web portal is the most visited website in Japan, and its internet services are mostly dominant in the country. According to The Japan Times, as of 2012, Yahoo Japan had a footprint on the internet market in Japan. In terms of use as a search engine, however, it has never surpassed Google. The company is the second largest search engine used in Japan as of July 2021, with a market share of 19% behind Google's 77%. In March 2021, the company merged with Line Corporation, placing both companies under parent Z Holdings. History Yahoo! and SoftBank formed Yahoo! Japan in January 1996 to establish the first web portal in Japan. Yahoo! Japan went live 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 acquired the naming rights for the Fukuoka Dome in 2005, renaming the dome as the "Fukuoka Yahoo! Japan Dome". The "Yahoo Dome" is the home field for the Fukuoka SoftBank Hawks, a professional baseball team majority owned by SoftBank. Since 2010, Yahoo! Japan's search engine has been based on Google's search technology. In exchange, Google receives user activity data from Yahoo! Japan's various products. In 2017, Verizon Communications purchased the core internet business of United States-based Yahoo!, and merged it with AOL into Oath, Inc.; Yahoo! Japan was not affected. It continued as a joint venture between Softbank and what remained of Yahoo! Inc. was renamed Altaba. Yahoo! had been declining economically and in popularity since the late 2000s, but this was not the case for Yahoo! Japan, which continued to dominate Japan's internet industry. Following the sale, Yahoo! Japan continued to use the name "Yahoo!" under license from Verizon Communications. In July 2018, SoftBank bought $2 billion worth of shares in Yahoo! Japan from Altaba, increasing its stake to 48.17 percent. Yahoo! Japan, in turn, bought