Tokyo is in Japan.
Japan ( 日本 Nippon [ ɲip̚poɴ ] or Nihon [ ɲihoɴ ] formally or Nihon-koku , meaning `` State of Japan '' ) is a sovereign island nation in East Asia . The is a geographical area of Honshu , the largest island of Japan . Tokyo ( [ toːkjoː ] , [ langˈtoʊki.oʊ ] ) , officially Tokyo Metropolis , is the capital of Japan and one of its 47 prefectures . Tokyo is in the Kantō region on the southeastern side of the main island Honshu and includes the Izu Islands and Ogasawara Islands .