Individual #Honshu__Hondo  the largest of the four main islands of Japan; between the Sea of Japan and the Pacific Ocean; regarded as the Japanese mainland
  instance of:  #island
  part:  #Tokyo  #Nagoya  #Osaka  #Yokohama  #Kyoto  #Hiroshima
  part of:  #Japanese_Islands__Japan__Japanese_Archipelago  a string of more than 3,000 islands east of Asia extending 1,300 miles between the Sea of Japan and the western Pacific Ocean
     part of:  #Pacific_Ocean__Pacific  the largest ocean in the world

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