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Data center campus

SoftBank Hokkaido Tomakomai AI Data Center

SoftBank Hokkaido Tomakomai AI Data Center is an AI data center campus developed by SoftBank Corp. in Hokkaido, Tomakomai. 0.30 GW of capacity has been announced; none is energized yet. The gap is what this page tracks: what is claimed versus what is actually built, each figure dated and sourced.

Under construction · SoftBank Corp. · other · Tomakomai, Hokkaido, Japan

Track SoftBank Hokkaido Tomakomai AI Data Center

Capacity: announced vs energized

Contracted
not recorded
Energized
not recorded

Announced-to-energized gap: 0.30 GW. Every figure below is a single dated, sourced claim. Current best per series resolves by evidence tier, then date. See the methodology.

73rd-largest announced of 102 tracked campuses33th percentile announced-to-energized gap≈ 243,000 homes of power at full announced capacity (basis)

Promised online: 2026. 3 months away. Claimed by SoftBank (source).

SoftBank Hokkaido Tomakomai AI Data Center capacity claims
Source
Announced0.30 GW2025-06-01claimedpress release
Under construction0.05 GW2025-06-01reportedjournalist report

Key facts

under construction

Lifecycle

0.30 GW

Announced

0 GW

Energized

SoftBank Corp.

Developer

Japan

Location

other

Grid

0.30 GW

Announced-to-energized gap

Reported facts

Structured facts sourced from citations already on this record. Each fact traces to a source in the References section below.

Groundbreaking Apr 15 2025 / SoftBank + IDC Frontier (primary)
On April 15, 2025, SoftBank Corp. and subsidiary IDC Frontier held a groundbreaking ceremony for the Hokkaido Tomakomai AI Data Center in Tomakomai City, Hokkaido. SoftBank frames the campus as a core facility for its Brain DataCenter concept under a next-generation social infrastructure push to decentralize data processing and energy use away from Tokyo/Osaka concentration (SoftBank News, May 1 2025; IDC Frontier, Apr 18 2025)
700,000 sqm / >300 MW design / FY2026 ops (primary)
SoftBank states the Tomakomai campus is expected to become one of Japan's largest AI data centers, with an area of 700,000 square meters and power capacity expected to exceed 300 megawatts, scheduled to begin operations in fiscal 2026 (year ending March 2027). Treat the >300 MW figure as SoftBank's stated design/expansion outlook, not as currently energized IT load (SoftBank News, May 1 2025; SoftBank News, Feb 25 2026)
100% Hokkaido renewable / local offtake (primary)
SoftBank and IDC Frontier describe the facility as designed to operate entirely on renewable energy procured locally within Hokkaido Prefecture (company framing: local-production / local-consumption renewable power for the AI campus) (SoftBank News, May 1 2025; IDC Frontier, Apr 18 2025)
Construction progress / METI subsidy framing (primary)
In a Feb 25, 2026 SoftBank News interview, SoftBank DC engineering staff said plans advanced since around 2023 and estimated the project about 60 to 70 percent complete toward a fiscal 2026 opening, noting a METI subsidy and ecological surveys during construction. Treat the percent-complete figure as SoftBank staff characterization at interview time (SoftBank News, Feb 25 2026)

On the data center map

No mappable coordinate is recorded for SoftBank Hokkaido Tomakomai AI Data Center yet. Location: Tomakomai.

The story of SoftBank Hokkaido Tomakomai AI Data Center
Announced capex
$456M
Cooling
700,000 sqm site (~173 acres); part of SoftBank 'Brain DataCenter' initiative
Derived
Cost per MW
$2M/MW

Every figure is one row in the ledger below with its source. Derived rows are pure arithmetic on the rows above (not new claims). Absent lines mean the fact isn't on record yet.

The deal

developer
SoftBank Corp.
operator
IDC Frontier Inc. · SoftBank subsidiary
financier
Japan Ministry of Economy, Trade and Industry (METI) · Subsidy of up to ¥30 billion

Power

Power source
other
Grid operator
other
Interconnection

100% locally-sourced Hokkaido renewable supply, other, Announced. Facility to operate entirely on renewable energy procured within Hokkaido Prefecture

Why here

SoftBank Hokkaido Tomakomai AI Data Center is in Hokkaido, Tomakomai. It connects to the other grid, draws on other power. This siting summary is composed from the record's held fields, not speculation; see methodology.

Financial structure

Total project investment (~¥65 billion)
$456M journalist report
Japan METI subsidy (up to ¥30 billion)
up to $210M. Ministry of Economy, Trade and Industry subsidy journalist report
First-phase project cost (~65B yen)
$456M. Approx. USD equivalent of ~65 billion yen journalist report

Regulatory paper trail

The filings and rules on record for this site and its jurisdiction, most recent first. Each is a sourced, dated artifact you can follow to the primary document.

Investment, workforce and specs

Cooling
700,000 sqm site (~173 acres); part of SoftBank 'Brain DataCenter' initiative source

Timeline

  2. Aug 2026
    financial recorded
    capex: First-phase project cost (~65B yen)
  3. Oct 2026
    Current: Under construction

Sources

54a987fd-de69-42a8-8460-604b263334e5 · Tracked with DEPLOY's verified-vs-claimed methodology. Every term is defined in the glossary. Announced numbers are claims, not built capacity.

Head-to-head

SoftBank Hokkaido Tomakomai AI Data Center vs SoftBank/OpenAI Sakai AI Data Center →

Common questions

What is SoftBank Hokkaido Tomakomai AI Data Center?
SoftBank Hokkaido Tomakomai AI Data Center is an AI data center campus tracked on the DEPLOY registry, located in Tomakomai. DEPLOY records its capacity as a dated, sourced ledger: announced gigawatts versus actually energized gigawatts, never a press-release total.
How much power will SoftBank Hokkaido Tomakomai AI Data Center use?
SoftBank Hokkaido Tomakomai AI Data Center has 0.30 GW of announced capacity on the DEPLOY registry; no energized capacity is yet recorded. Each figure is individually dated and sourced.
Who is building SoftBank Hokkaido Tomakomai AI Data Center?
SoftBank Corp. is recorded as a party to SoftBank Hokkaido Tomakomai AI Data Center on the DEPLOY registry.
Is SoftBank Hokkaido Tomakomai AI Data Center operating yet?
As of the most recent verification on the DEPLOY registry, SoftBank Hokkaido Tomakomai AI Data Center is under construction. DEPLOY tracks the lifecycle from announced through energized, so the current state reflects sourced evidence, not the original announcement.
How verified is the data on SoftBank Hokkaido Tomakomai AI Data Center?
A human editor has reviewed this record for the indexed registry. Every capacity figure is an append-only, dated claim resolved to the highest-evidence tier; superseded claims are kept but excluded from the current view.

Deploy Watch

Track SoftBank Hokkaido Tomakomai AI Data Center on Deploy.

We notify you when energized capacity, lifecycle state, or a new dated capacity claim changes against primary-source evidence, not when the developer issues a press release.

Cite this page

DEPLOY. (2026). SoftBank Hokkaido Tomakomai AI Data Center: AI data center campus record. Retrieved October 4, 2026, from https://registry.deploy.report/datacenters/softbank-hokkaido-tomakomai-ai-data-center

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The verified data on this page is available under a Creative Commons Attribution 4.0 license: reuse the facts freely, with attribution to DEPLOY (deploy.report). The prose, design, and any imagery are not included and keep their own rights.

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