Updated: Jan 8, 2022
To make up Japan there is 6,582 but here are the main 4 islands in Japan. One of the 4 islands are Hokkaido. Hokkaido covers 22% of Japan. Hokkaido is Japan's biggest prefecture.
The second main island is honshu. Hounshu has Japan's the biggest mountain and the biggest lake. Honshu holds Mount Fuji and Lake Biwa.
The third main island is Shikoku. Shikoku is famous for the 88-temple pilgrimage of temples there.
The fourth main island in Japan is Kyushu. Kyushu is famous for its hot springs and one of the most volcanic places in the world.