Nikkō (日光市 Nikkō, literally "Sunlight City") is a city located in the mountainous region of Tochigi Prefecture, Japan, about 140 kilometers north of Tokyo. The city is a popular tourist destination, as it contains numerous historical monuments (some very old) which have earned it the inclusion in the list of UNESCO World Heritage Sites. The most important monuments of the city are the Nikko Shrine ( Nikkō Tōshō-gū), dedicated to the shōgun Tokugawa Ieyasu of which it is the mausoleum, the temple dedicated to his nephew Tokugawa Iemitsu and the Futarasan Shinto Shrine (Futarasan Jinja), dating back to 767 There are also numerous hot springs (onsen) in the surrounding region, while in the mountains west of the city is Nikkō National Park, with some highly spectacular waterfalls and trails. On March 20, 2006, the old Nikko City merged with the city of Imaichi and the municipalities of Ashio, Fujihara and Kuriyama, resulting in the new city of Nikko. Masaru Ibuka, co-founder of Sony, was born in Nikko.