Japan geography: islands, mountains and natural features

Japan geography is shaped by its position on the Pacific Ring of Fire. The country is a long chain of islands with steep mountains, active volcanoes and short, fast rivers. These features explain the hot springs, the frequent earthquakes and the concentration of cities on narrow plains.

Size and islands

Japan covers about 378,000 square kilometres, slightly larger than Germany or Italy. A 2023 survey counted 14,125 islands, but four main islands, Honshu, Hokkaido, Kyushu and Shikoku, make up most of the land. Okinawa leads a separate southern chain stretching towards Taiwan.

Mountains and volcanoes

Mountains and hills cover roughly three quarters of the territory, and forests about two thirds. The Japan Alps in central Honshu include peaks above 3,000 metres. Mount Fuji, an active volcano, is the highest point at 3,776 metres. Japan has 111 active volcanoes, monitored by the Japan Meteorological Agency, including Sakurajima in Kagoshima and Mount Aso in Kumamoto.

Rivers, lakes and coasts

Rivers are short and steep; the longest, the Shinano, runs about 367 kilometres. Lake Biwa, near Kyoto, is the largest lake. The coastline, more than 29,000 kilometres long, alternates between rocky cliffs, sandy beaches and the sheltered Seto Inland Sea.

Climate zones

Natural hazards

Japan geography brings earthquakes, tsunamis, typhoons, heavy snow and volcanic activity. Building codes, warning systems and drills are among the most advanced in the world. See the earthquakes and tsunamis guide for safety advice.

How Japan geography shapes travel

Mountains make tunnels and bridges essential, which is why bullet trains run through long tunnels. Volcanic activity feeds thousands of hot springs, and the long north-south shape allows skiing in Hokkaido and swimming in Okinawa in the same month.

National parks

Japan has 35 national parks, from Shiretoko and Daisetsuzan in Hokkaido to the Chubu-Sangaku park in the Japan Alps, Fuji-Hakone-Izu near Tokyo and the subtropical forests of Yakushima. They offer hiking, hot springs and wildlife such as deer, monkeys and brown bears in Hokkaido.

Hot springs

Volcanic heat feeds more than 27,000 hot spring sources. Famous onsen towns include Beppu and Yufuin in Kyushu, Kusatsu in Gunma, Hakone near Tokyo and Noboribetsu in Hokkaido. Each spring has its own mineral composition, colour and claimed benefits.

Land use

With limited flat land, cities spread along coasts and valleys, and rice terraces climb hillsides. Reclaimed land supports airports such as Kansai and Haneda and parts of Tokyo Bay.

Seas around Japan

The Sea of Japan lies to the west, the Pacific Ocean to the east, the Sea of Okhotsk to the north and the East China Sea to the southwest. Warm and cold ocean currents meet off the coast, which explains the rich fishing grounds and the variety of seafood found in markets. Islands such as Sado, Naoshima and Yakushima reveal very different landscapes, from rice fields to ancient cedar forests.

Official source: Japan National Tourism Organization

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