Sherpa Atlas · Japan
Japan’s data centres, grid and power plants on one map
Japan is one of Asia’s largest data-centre markets, led by Tokyo and Osaka, with new campuses in Hokkaido and Kyushu. The Japan edition covers the whole country and maps each data centre with its operator, stage and stated capacity, next to the substations, power lines and generation around it.
What the Japan edition covers
Data centres, substations, grid upgrades, power plants, district heating and fibre across Japan
Data centres
Every site from planned to operating, with its operator, development stage and stated capacity, placed on the map next to the grid and the generation around it.
Substations and demand
Substations of 66 kV and above across every regional grid, each with its Japanese name and romanisation. Every municipality is coloured by the data-centre capacity stated there and the generation planned.
Grid upgrades and power plants
The interregional and in-area reinforcements in OCCTO’s plans, large-demand connection applications by area, what OCCTO and the government have said about data-centre demand, and power plants including Japan’s register of certified renewable projects of 1 MW and more.
Where the market is
From Tokyo and Osaka to the new campuses in Hokkaido and Kyushu
Tokyo area
Central Tokyo, Tama, Yokohama and Kawasaki, and the Inzai–Shiroi cluster in Chiba, the free demo area
Kansai
Osaka, the Keihanna science city between Kyoto, Osaka and Nara, and Kobe
Hokkaido
Ishikari, Tomakomai and the sites the prefecture has set aside for data centres
Kyushu
Fukuoka, Kitakyushu and the projects along the coast to Satsumasendai
Chubu and the regions
Nagoya, Niigata, Tohoku, Chugoku, Shikoku and Okinawa
How teams use it
Three ways to put the Japan map to work
Screen sites across Japan
Compare municipalities by the data-centre capacity stated there and the generation planned, then look at the substations, power lines and existing sites around a location before a site visit or a technical enquiry.
Follow the pipeline
See which campuses are operating, under construction, planned or on hold, who operates them and how much capacity each states, and where new development is concentrating.
Read the grid plans
Set the interregional and in-area reinforcements in OCCTO’s plans, and what OCCTO and the government have said about data-centre demand, against the places they serve.
Try it, then subscribe
Open Inzai in full for free, or the whole of Japan from $400 a month
Free records
Click any dot on the map to open a record in full: 5 free, then 7 a day with a free account.
The free Inzai demo
A free account opens the Inzai (Chiba) demo area in full: every site, substation and record there.
The Japan edition in full
From $400 a month, first month half price. Cancel any time, or save with 6 months or a year. Global Access to every country on request.
The Tokyo area: data centres · grid capacity
Data sources
Grid upgrades and statements on demand: OCCTO (edited by Sherpa Atlas), the Agency for Natural Resources and Energy and the Japanese government. Large-demand connection applications: 送配電網協議会 (edited by Sherpa Atlas). Municipalities: MLIT N03 administrative areas (CC BY 4.0).
Japan: register of certified renewable projects, Agency for Natural Resources and Energy (as of 30 Sep 2026; Government Standard Terms of Use 2.0). Positions at town level: 大字・町丁目位置参照情報 国土交通省 (2025, 19.0b).
Power plants worldwide: Global Energy Monitor, Global Integrated Power Tracker, September 2026 release (CC BY 4.0); units combined into plants. Licensed under CC BY 4.0.
Substations, power lines and data-centre positions: © OpenStreetMap contributors (ODbL).