Physical setting
Island country
geographic context
Statistics Bureau
🇯🇵
Geography & Environment
Geography & Environment in Japan
TokyoJST
Island archipelago · about three-quarters mountainous · subarctic to subtropical
Japan is a long island arc with steep mountain terrain, a complex coastline and strong climate variation from Hokkaido to Okinawa. This profile focuses on physical geography and environmental measurements, keeping population, economic and practical-travel interpretation in their own DigifyWorld verticals.
Surface area
377,974.87 km²
April 2026
GSI
Highest point
3,776 m
Mt. Fuji
GSI
Forest area
25.02M ha
March 2022
Forestry Agency
Net GHG emissions
994 Mt
CO₂e · FY2024
Ministry of the Environment
Japan at a Glance
A physical profile of the archipelago, terrain, water and environmental measurements.
Archipelago and north-south span
Approx. 45°N to 20°N · five main island groups · 14,000+ smaller islands
about 45°Nabout 20°N
Terrain~75% mountainous and hilly
Coastline~35,000 km
Island structure5 main groups
Longest river
367 km
Shinano River, April 2024.
Largest lake
669.3 km²
Lake Biwa, January 2025.
Protected land
20.8%
Protected areas, August 2025. Including OECMs: about 21.0%.
Highest point
3,776 m
Mt. Fuji
Forest cover
66.2%
approx. share of land area
Marine protected
13.3%
August 2025
Renewable electricity
22.9%
FY2023
Terrain, Climate and Environment
Three visual summaries designed to be scanned together before the deeper explanation.
Elevation profile
Five highest listed peaks · metres above sea level
Climate range
JMA broad regional lens
01
Northern JapanWarm summers, very cold winters, heavy snow in many areas.
02
Eastern JapanHot humid summers, cold winters, heavy snow on the Sea of Japan side.
03
Western JapanVery hot humid summers and moderately cold winters.
04
Okinawa & AmamiSubtropical oceanic climate with mild winters.
Environmental indicators
Forest, protection and emissions
Forest66.2%
Forest area25.02M haMarch 2022
Net GHG994 MtCO₂e · FY2024
Below FY201328.7%net emissions
Structural Natural-Hazard Exposure
Geographic exposure only. No event narratives, casualty figures or sensational rankings.
Tectonically active setting
Physical geography
Japan lies in a highly active mobile belt. The page records structural seismic and volcanic setting only, using geological or meteorological authorities where such indicators are included.
Understand the landscape
What Japan's geographic profile is telling you
Japan's long north-south island arc produces marked climate variation, while mountainous and hilly terrain dominates much of the land surface. The country's physical profile is therefore shaped by both latitude and relief.
Environmental indicators do not share one reporting year. Forest area, protected-area coverage, renewable electricity and greenhouse gas emissions are shown with their own observation periods rather than being forced into a single "current" year.
Detailed Geography & Environment Data
The visual profile above is backed by the same values in structured HTML so the page remains useful for accessibility, search and verification.
| Indicator | Japan | Reference period | Source |
|---|---|---|---|
| Physical setting | Island country | Stable geography | Statistics Bureau |
| Surface area | 377,974.87 km² | April 2026 | GSI |
| Highest point | 3,776 m | 2025 reference | GSI |
| Longest river | 367 km | April 2024 | Statistics Bureau |
| Largest lake | 669.3 km² | January 2025 | Statistics Bureau / GSI |
| Forest area | 25.02M ha | March 2022 | Forestry Agency |
| Protected land | 20.8% | August 2025 | Ministry of the Environment |
| Protected marine | 13.3% | August 2025 | Ministry of the Environment |
| Protected land + OECMs | 21.0% | August 2025 | Ministry of the Environment |
| Renewable electricity | 22.9% | FY2023 | Agency for Natural Resources and Energy |
| Net GHG emissions and removals | 994 Mt CO₂e | FY2024 | Ministry of the Environment |
| Forest and other removals | 52.3 Mt CO₂e | FY2024 | Ministry of the Environment |
Frequently Asked Questions
How large is Japan?
Japan's national area was 377,974.87 square kilometres as of April 1, 2026, according to the Geospatial Information Authority of Japan.
How mountainous is Japan?
Mountainous and hilly terrain accounts for about three-quarters of Japan's total area, according to the Statistical Handbook of Japan 2025.
How much of Japan is forested?
Japan had 25.02 million hectares of forest as of March 2022, roughly two-thirds of its national land area, according to the Forestry Agency.
Does this page cover natural disasters in Japan?
No. This vertical covers structural geographic exposure such as tectonic setting. It does not use individual disaster events, casualty counts or recent-disaster narratives.
Sources & methodology
Sources for the data and definitions shown above.
View sources used for this page
Statistics Bureau of Japan, Statistical Handbook of Japan 2025
Island structure, mountainous terrain, Mt. Fuji, major rivers and lakes.
Geospatial Information Authority of Japan, national area survey
Official national area measurement, including the April 1, 2026 total of 377,974.87 square kilometres.
Japan Meteorological Agency
National climate description and broad regional climate characteristics.
Forestry Agency
Forest area of 25.02 million hectares as of March 2022.
Ministry of the Environment, Environment and Biodiversity White Paper 2026
Protected-area coverage as of August 2025 and the distinction between protected areas and OECM-inclusive 30by30 coverage.
Ministry of the Environment, FY2024 greenhouse gas release
Net greenhouse gas emissions and removals, FY2013 comparison and removals from forests and other sinks.
Agency for Natural Resources and Energy
Renewable electricity share in FY2023.
Ministry of Land, Infrastructure, Transport and Tourism
National coastline length. The March 2024 total is 35,268,157 metres, shown on this page as approximately 35,000 km.