Four main islands in Japan?
The 4 largest islands by size are Honshu, Hokkaido, Kyushu, and Shikoku.Japan has 6,848 other islands of varying size and habitation, most very small (under 1 km2).This includes artificial islands in Tokyo Bay and Osaka Bay.Japan is an archipelago of 6,852 islands. The four largest islands are Honshū, Hokkaidō,Kyūshū and Shikoku, together accounting for ninety-seven percent of Japan's land area.