Nationwide market intelligence
Japan's data center landscape, market by market
A facility-level reference and market brief for investors tracking Japan's data center build-out end to end — from the hyperscale core in Tokyo and Osaka to renewable-powered campuses in Hokkaido and connectivity hubs in Fukuoka and Naha.
288
Facilities tracked
36
Regional markets
9
Geographic regions
95
Operators
Why regional matters
Tokyo and Osaka are running out of power
Independent research firms put different numbers on the market, but they agree on the shape of the story: demand is concentrated, power is constrained, and the frontier is moving outward.
~85–90%
Share of Japan's data center computing power currently concentrated in Greater Tokyo and Greater Osaka
~37% → 50%+
Tokyo's own share of national computing power, current vs. projected by 2026
up to ~35%
Share secondary markets (Kanagawa, Kobe, Ishikari/Hokkaido, Kyushu) could reach by 2034
19 TWh → 57–66 TWh
Japan data center power demand, 2024 vs. 2034 projection
~60%
Share of Japan's total electricity demand growth expected to come from data centers
5–10 years
Reported wait time for a new grid power connection in inner Tokyo
6.6–7.7 GW
Projected data center peak power demand by 2034 (~4% of Japan's national total)
Total market size — three independent estimates
$9.93B (2024) → $13.35B (2030)
5.06% CAGR
— Introl
$23.4B (2024) → $33.4B (2030)
6.7% CAGR
— JLL
$12.76B (2025) → $38.92B (2031)
20.42% CAGR
— Arizton
Figures differ because each firm scopes and forecasts the market differently. See full citations and methodology →
Geography
Where the facilities are
Every tracked facility, color-coded by region. Click a marker for details, or open the full map to filter by region.
Geography
Facility count by region
Regions ordered north to south; each links to the markets and facilities within it.
Kanto
160 facilities
11 markets
Japan's overwhelming center of gravity: Tokyo itself is now the single largest market tracked here, alongside the Inzai (Chiba), Yokohama/Kawasaki (Kanagawa), Saitama, Tsukuba (Ibaraki), Oyama (Tochigi), and Maebashi (Gunma) satellite hubs that ring the capital — several of which exist precisely because central Tokyo's power grid is running out of room.
Kansai
68 facilities
3 markets
Osaka is directly represented here as Japan's second-largest concentration after Tokyo, with Kobe and Maizuru rounding out a corridor that JLL and other research firms flag as the country's fastest-growing hub outside the capital.
Chubu
18 facilities
5 markets
Includes Nagoya (Aichi), the Hokuriku facilities around Kanazawa, Nagano, and Niigata/Shizuoka — a manufacturing-heavy corridor with growing interconnection demand.
Hokkaido
10 facilities
3 markets
Cold climate and abundant wind/solar resources make Hokkaido a focal point for renewable-powered and free-air-cooled facilities, headlined by SoftBank's Tomakomai AI campus, with Iwamizawa adding further regional capacity.
Kyushu
8 facilities
3 markets
Fukuoka anchors this region as a connectivity gateway toward Korea and mainland Asia, with Kagoshima and Genkai (Saga) representing further reach across the island.
Chugoku
7 facilities
4 markets
Hiroshima, Okayama, Matsue, and Yamaguchi represent early-stage regional capacity on the San'yo/San'in coasts.
Shikoku
6 facilities
2 markets
Takamatsu is the island's principal cluster, with Matsuyama adding further coverage — both serving as redundancy/disaster-recovery locations relative to the Honshu mainland.
Okinawa
6 facilities
2 markets
Naha's position on subsea cable routes toward Taiwan and Southeast Asia gives Okinawa a distinct connectivity role despite its small facility count.
Tohoku
5 facilities
3 markets
A smaller footprint so far, with facilities in Sendai, Fukushima, and Aomori offering an alternative to Kanto's power-constrained core.
Notable projects
Flagship facilities
A handful of facilities in the dataset carry independently verified public detail worth calling out.
SoftBank Hokkaido Data Center
SoftBank
Groundbreaking facility under construction in Tomakomai, Hokkaido, spanning 700,000 sqm, designed to support AI development.
KCCS ZED Ishikari
Kyocera Communication Systems (KCCS)
Zero Emission Data Center on 15,000 sqm land, 5,300 sqm total floor area, 1,100 sqm server rooms, up to 400 racks, 2-3MW power receiving capacity.
Who's building
Top operators by facility count
A mix of domestic telcos, regional utilities, and international colocation platforms.
| 1 | KDDI Corporation | 25 facilities | 9 markets |
| 2 | NTT DATA, Inc. | 22 facilities | 7 markets |
| 3 | Equinix | 21 facilities | 2 markets |
| 4 | Digital Realty | 10 facilities | 3 markets |
| 5 | Digital Edge DC | 10 facilities | 3 markets |
| 6 | Colt Data Centre Services | 10 facilities | 2 markets |
| 7 | Ada Infrastructure | 8 facilities | 3 markets |
| 8 | SCSK Corporation | 7 facilities | 3 markets |
Coverage
Global Data Center News
Aggregated automatically from data center industry RSS feeds and refreshed roughly every hour. This feed isn't curated or fact-checked by this site — read at the source before relying on any figure. Items judged relevant to Japan are flagged.
Feed last refreshed Oct 2, 2026, 3:28 PM UTC · Aggregated from: DatacenterDynamics, Data Center Knowledge, Data Center News (APAC), DCNN Magazine, Uptime Institute Blog, Data Center Café (Japan)
SUBCO, an Australian developer of undersea fibre optic cable networks, has announced three new subsea cable systems – APX North, APX East-2, and APX West – to provide additional connectivity capacity for AI and other data-intensive applicat
DCNN Magazine · Sep 24, 2026