Japan is a 3,000 km chain of islands, three-quarters mountainous, divided into 8 regions and 47 prefectures. Click any region to see what it contains and what it's known for.
This page answers one question: what does Japan actually look like, and how is it divided? Start with the interactive region map, then read the geography that explains why Japanese cities, weather, and travel routes are shaped the way they are.
Select a region to see its prefectures and what it is known for.
Real prefecture outlines, grouped into the 8 regions. Tokyo’s Izu and Ogasawara islands lie outside the visible area. Base map by simplemaps.com
The northernmost main island, separated from Honshu by the Tsugaru Strait (crossed by the Seikan undersea tunnel).
The northern third of Honshu, directly south of Hokkaido.
East-central Honshu, on the Pacific coast.
The wide middle of Honshu, spanning coast to coast.
West-central Honshu, around Osaka Bay.
The western end of Honshu, between the Sea of Japan and the Seto Inland Sea.
The smallest of the four main islands, south of Honshu across the Seto Inland Sea, linked by three bridge routes.
The southwestern main island, plus the Okinawa island chain a further ~700 km southwest.
Figures are drawn from Japanese government sources (Geospatial Information Authority, Statistics Bureau) as of 2023–2025. Statistics are periodically revised — check the official source before citing exact numbers.
Japan is an archipelago off the eastern edge of Asia, stretching roughly 3,000 km from the sub-arctic north of Hokkaido to the subtropical islands of Okinawa. Because it is long from north to south but narrow from east to west, the climate changes dramatically along its length: in the same week, Hokkaido can be under deep snow while Okinawa is warm enough for the beach. The whole country still uses a single time zone.
Roughly three-quarters of Japan's land is mountainous, and about two-thirds is covered in forest. A spine of mountains runs down the middle of the main island of Honshu, including the Japanese Alps, which rise above 3,000 m. Because so little land is flat, almost all large cities, farmland, and rail lines are squeezed onto narrow coastal plains — the Kanto Plain around Tokyo is the largest of them.
Japan sits where several tectonic plates meet, on the Pacific 'Ring of Fire'. That is why the country has over a hundred active volcanoes, frequent earthquakes, and thousands of natural hot springs (onsen). The same geology that makes earthquake-resistant building codes necessary also gives Japan its volcanic scenery, crater lakes, and hot-spring resort towns.
The mountain spine splits Honshu into two climatically distinct sides. The Sea of Japan side (the 'back' side) receives some of the heaviest snowfall on Earth in winter, as cold Siberian air picks up moisture crossing the sea. The Pacific side, where Tokyo, Nagoya, and Osaka sit, gets drier, sunnier winters — but takes the brunt of the typhoon season from roughly August to October.
Japan's 47 prefectures are the actual administrative units. The 8 regions below are conventional groupings rather than a level of government — but they are what timetables, weather forecasts, rail passes, and travel guides use, so knowing them makes planning much easier.
Japan has 47 prefectures, which are the real administrative divisions. They are conventionally grouped into 8 regions — Hokkaido, Tohoku, Kanto, Chubu, Kansai, Chugoku, Shikoku, and Kyushu (with Okinawa usually counted alongside Kyushu). The regions are not a level of government, but they are used constantly in weather reports, rail passes, and travel planning.
From north to south: Hokkaido, Honshu (the largest, holding Tokyo, Kyoto, and Osaka), Shikoku, and Kyushu. Beyond these, Japan counts roughly 14,125 islands in total following a 2023 recount by the Geospatial Information Authority of Japan — the older figure of 6,852 you may still see was based on a 1987 survey with a different counting method.
Japan sits at the meeting point of several tectonic plates on the Pacific Ring of Fire. The collision of those plates pushes the land upward, which is why roughly three-quarters of the country is mountainous and why it has over a hundred active volcanoes, frequent earthquakes, and thousands of hot springs.
Most first trips combine Kanto (Tokyo) and Kansai (Kyoto, Nara, Osaka), because they hold the biggest cities and the highest concentration of famous sights and are connected by about 2.5 hours on the Tokaido Shinkansen. Add Chubu if you want mountains and Mt. Fuji, Hokkaido for snow, or Okinawa for beaches.
No. Despite stretching about 3,000 km from north to south, the entire country uses a single time zone, Japan Standard Time (UTC+9), and does not observe daylight saving time.
The outlines are real prefecture boundaries, based on a public-domain-licensed vector map from simplemaps.com, coloured by region. It is drawn for reading at a glance, so small islands and fine coastal detail are generalised, and Tokyo's far-flung Izu and Ogasawara islands are outside the visible area. It is not a survey map and carries no political claim about disputed territory.
