Web portal run by Yahoo! Japan Corporation (ヤフー株式会社, Yafū Kabushiki-gaisha), a Japanese internet company originally formed as a joint venture between the 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.