
Iceland is a Nordic island state in the North Atlantic with a population of about 393,000 in late 2025 and a land area of 103,000 km². It is a unitary parliamentary republic whose capital and largest city is Reykjavík, noted for a geologically active landscape powered by abundant geothermal and hydropower resources, a high level of human development, and membership in organizations such as NATO, the European Economic Area, and the Schengen Area.

Japan is an island nation in East Asia, located in the Pacific Ocean off the northeast coast of the Asian mainland. It comprises 14,125 islands, including the five main islands of Hokkaido, Honshu, Shikoku, Kyushu, and Okinawa. The country's capital and largest city is Tokyo.