Geography - Japan and the World: Regions, Landforms, Climate, Population, Industry, and Regional Issues
The Geography domain tests how physical and human processes shape Japan's regions and its links with the world. Expect questions that combine maps, climate data, population statistics, and industrial location, not isolated place-name recall.
Core patterns
Japan is an archipelago of about 14,000 islands; the four largest are Honshu, Hokkaido, Kyushu, and Shikoku. About 75% of the land is mountainous, so settlements and farmland cluster on narrow plains and coastal lowlands. The Kanto Plain is the largest, supporting the Tokyo metropolitan area. Japan sits on converging plate boundaries, producing trenches, volcanic arcs, earthquakes, and tsunamis; this also creates hot springs and mountainous scenery but imposes disaster-risk planning.
Climate is temperate to subtropical and strongly seasonal. The winter monsoon from Siberia picks up moisture over the Sea of Japan, so Sea of Japan-side regions receive heavy snow, while Pacific-side regions are drier. The June–July tsuyu rainy season and August–September typhoons affect much of the country. Regional contrasts matter: Hokkaido has cool summers and cold winters; Okinawa is subtropical.
Population is aging and declining nationally, with heavy concentration in the Tokyo, Osaka, and Nagoya metropolitan areas. Rural regions face depopulation, school closures, and strained services. Industry clusters in the Keihin (Tokyo–Yokohama), Hanshin (Osaka–Kobe), Chukyo (Nagoya), and Kitakyushu belts, benefiting from ports, skilled labor, and transport links. Agriculture is small-scale and protected; rice remains important, while fishing and tourism vary by region.
Worked example
Two climate graphs are described. Station A has heavy precipitation in December–February and lower summer rainfall; Station B has dry winters and wetter summers. Which is on the Sea of Japan side? A, because winter monsoon air crossing the Sea of Japan gains moisture and is forced up by mountains, producing snow on the windward side; Station B lies leeward on the Pacific side.
Traps
Do not confuse the number of prefectures (47) with the eight traditional regions. Do not claim all of Japan is subtropical. Do not explain heavy snow by latitude alone; use monsoon direction and relief. In population questions, distinguish absolute numbers from rates and remember that metropolitan in-migration can coexist with national decline.