• Hokkaido – the northernmost and second largest main island.
  • Honshu – the largest and most populous island with the capital Tokyo.
  • Kyushu – the third largest main island and nearest to the Asian continent.
  • Shikoku – the second smallest main island after Okinawa. It is between Honshu and Kyushu.
  • Okinawa Island – the smallest and southernmost of the main islands.