The Okinawa Islands belong to the Ryūkyū Islands. The islands are situated about 685 kilometres offshore from the southernmost point of Kyushu.
Okinawa Hontō is the main island and also the largest of the about 70 islands and islets of the Ryukyu Islands. It covers an area of about 1'208 square kilometres. Its highest point at 502 metres is known as Mt. Yonaha. Mt. Yonaha is considered to be a special protected area because of the many rare Okinawa species of flora and fauna.
Other mountains are Mt. Ibu (Ibu-dake 352 m), Mt. Iyu (Iyu-dake 446 m), Mt. Nishime (Nishime-dake 420 m) Mt. Tamatsuji (Tamatsujiyama 289 m), Mt. Terukubi (Terukubiyama 395 m) and Mt. Yae (Yae-dake 453 m).
Ryukyu 1963, Okinawa Hontō.
Japan 1999, Iejima Island.
The island covers 23 square kilometres and is situated only few kilometres in the west of Okinawa Hontō.
Its highest point is the Gusuku-yama (173 m), also known as "Tacchu".
Japan 2014, Tamatsujiyama 289 m.
The stamp was issued in the series "Japanese Mountains Series No 4".