Japan Data Center Index

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.

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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.

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Geography

Facility count by region

Regions ordered north to south; each links to the markets and facilities within it.

View interactive map →

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.

FlagshipSapporo

SoftBank Hokkaido Data Center

SoftBank

Groundbreaking facility under construction in Tomakomai, Hokkaido, spanning 700,000 sqm, designed to support AI development.

FlagshipSapporo

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.

1KDDI Corporation25 facilities9 markets
2NTT DATA, Inc.22 facilities7 markets
3Equinix21 facilities2 markets
4Digital Realty10 facilities3 markets
5Digital Edge DC10 facilities3 markets
6Colt Data Centre Services10 facilities2 markets
7Ada Infrastructure8 facilities3 markets
8SCSK Corporation7 facilities3 markets
View all operators →

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 Sep 28, 2026, 11:41 PM UTC · Aggregated from: DatacenterDynamics, Data Center Knowledge, Data Center News (APAC), DCNN Magazine, Uptime Institute Blog, Data Center Café (Japan)