Data centers in Japan
Datacenter Atlas tracks 169 facilities in Japan, 164 data centers and 5 network points of presence: 2% of the global inventory and #11 worldwide by facility count.
Compare with another country →
MW: megawatts of power for the computers. PUE: all the electricity a site draws divided by what reaches its computers (1.0 = nothing lost). Networks present: telecom networks recorded at each site, added up. Record quality (A to D) rates the record, not the site. Glossary →
Map
Largest hubs
A hub is a town with at least 5 facilities, with its close neighbours. Facilities in smaller towns are not listed here, so the hubs do not add up to the country total.
Top operators
All 169 facilities
Sorted by disclosed IT load, then networks present. A row opens the full, source-linked record on the map.
Disclosed IT load by state / region
| State / region | MW | Figures |
|---|---|---|
| Kyōto Prefecture | 75 | 2 |
Disclosed values only, campus figures counted once. Regions are assigned from each facility's coordinates (Natural Earth admin-1), so the rows add up to the national total.
⚡ Electricity context
- Electricity demand
- 1,030 TWh (2025)
- Grid carbon intensity
- 477 gCO₂/kWh
- Renewables share
- 23.6 %
- Low-carbon share
- 32.7 %
Source: Ember yearly electricity data (CC BY 4.0). Method
Water & climate exposure
- Data centers at high water stress (index ≥ 60)
- 0 of the 155 scored · 9 located at town level only are not scored
- Median baseline water stress (WRI Aqueduct, 0–5)
- 2.59
- Median riverine flood risk (0–5)
- 1.07
- Free-cooling hours ≤ 18 °C (median)
- 4,889 h/yr (56 %)
- Median cooling degree days
- 999
Derived indicators: WRI Aqueduct 4.0, GHSL, climate normals. See methodology. Method
Social friction index
Main driver: Neighbourhood (75/100)
How close people live: residents within 1 km and distance to the nearest homes. High = many close neighbours.
- Water
- Energy & grid
- Neighbourhood
- Concentration
- Policy context
- Observed conflict
Composite of water, grid, neighbourhood, concentration, policy and observed-conflict pressure. A derived indicator: not a measurement of public opinion. Method
Regulation
1 measure recorded
See the rules on the regulation map → · Compare with neighbouring countries →
Documented local conflicts & agreements
- Hino citizens' group opposes Mitsui Fudosan data center; buildings scaled down · 2026 · protest · ongoing
- Inzai residents sue over building certificate for new data center · 2026 · lawsuit · ongoing
Announced large projects
- SoftBank Sakai AI data center (former Sharp plant) · SoftBank Corp. · announced · 150 MW announced
Questions
How many data centers are there in Japan?
Datacenter Atlas (release 26.08-c2) records 169 facilities in Japan: 164 data centers, 5 network points of presence and 0 unclassified sites. The count covers facilities documented in OpenStreetMap, PeeringDB, Wikidata and operator disclosures.
Which companies operate data centers in Japan?
The operators with the most tracked facilities in Japan are NTT, Equinix, Digital Edge, IDCフロンティア, AirTrunk.
Where are data centers concentrated in Japan?
The largest hubs by facility count are Tokyo (56), Osaka (25), Inzai (16), 青梅市 (10), Kobe (4).
Cite this page: Datacenter Atlas (2026). Japan, release 26.08-c2. https://www.datacenter-atlas.com/country/japan · ODbL / CC BY 4.0