Japan is an archipelago of over 1,000 islands located in the Pacific Ocean. The four main islands are Honshu, Hokkaido, Kyushu, and Shikoku. Japan has a rugged coastline vulnerable to seasonal winds and storms, and many mountains and active volcanoes like Mount Fuji. The narrow coastal plains are densely populated and heavily farmed, but most of Japan's land is mountainous with limited space for housing, agriculture, and infrastructure. This geography contributes to issues of limited resources, high population density, and a reliance on public transportation.