Okinawa Island is the largest of the Okinawa Islands and the Ryukyu (Nansei) Islands of Japan in the Kyushu region. It is the smallest and least populated of the five main islands of Japan. The island is approximately 106 kilometres (66 mi) long, an average 11 kilometres (7 mi) wide, and has an area of 1,206.98 square kilometers (466.02 sq mi). It is roughly 640 kilometres (400 mi) south of the main island of Kyushu and the rest of Japan. It is 500 km (300 mi) north of Taiwan. The total population of Okinawa Island is 1.4 million.

Vancouver Island is in the northeastern Pacific Ocean, and part of the Canadian province of British Columbia. The island is 460 km (290 mi) in length, 100 km (62 mi) in width at its widest point, and 32,134 km2 (12,407 sq mi) in area. It is the largest island on the west coasts of the Americas.