Data Center Atlas
SoftBank Hokkaido Tomakomai AI Data Center
Under construction
Japan · 1 project · Last reported
Summary
SoftBank Corp. and its subsidiary IDC Frontier are building a large AI data center in Tomakomai, Hokkaido, as the core site of SoftBank's Brain DataCenter concept. The plan, selected for a Japanese government regional data center subsidy in 2023, starts with a data center of about 50 MW, with receiving capacity expected to grow past 300 MW on a site of about 700,000 square meters. Ground was broken in April 2025 and SoftBank targets opening in fiscal 2026. The company intends to run the facility on renewable electricity sourced within Hokkaido.
Source record as of 2026-06-23 · Details and sources
SoftBank's October 21, 2026 news article describes the Hokkaido Tomakomai AI Data Center as under construction by SoftBank in Tomakomai, aiming to open within FY2026, and declares its information current at publication. The record stays at the general construction stage; no building completion, energization, installed capacity or opening is established. evidence
SoftBank Corp. · published 2026-10-21
Location
The interactive map needs JavaScript. Display anchor: 42.63410, 141.60550 (Point locator, WGS 84).
View location: OpenStreetMap · Google Maps · Bing aerial · Copernicus Browser
Town or locality reference only; the facility position is not established.
Projects (1)
SoftBank Hokkaido Tomakomai AI Data Center
Under construction last observed as of · Authoritative status update
This record reports under construction as of 2026-06-23. SoftBank Corp. (SoftBank News); SoftBank Corp. (SoftBank News)
Location: Tomakomai, Hokkaido, JP. Sources name Tomakomai City only; coordinates are the OpenStreetMap Nominatim centroid of the city boundary. SoftBank Corp.; SoftBank Corp. (SoftBank News); W.Media
Use: Ai unspecified
Capacity, investment and other figures
| Measure | Value | Scope | As of | Notes | Sources |
|---|---|---|---|---|---|
| Power capacity | about 50 MW | Planned · Phase · Unspecified · Initial phase targeted for FY2026 | 2023-11-07 | SoftBank describes the first stage as a data center of about 50 MW scale, without saying whether this is receiving capacity or IT load. | SoftBank Corp. |
| Power capacity | 50 MW | Planned · Phase · Unspecified · Phase 1 (completion scheduled 2026) | 2025-04-30 | Trade press figure at groundbreaking; scope not stated. | W.Media |
| Power capacity | 10 MW | Planned · Phase · Grid connection · Initial receiving capacity (trade press) | 2023-11-07 | Dempa reported 10 MW of total initial receiving power; SoftBank's own release describes the first stage as a 50 MW-scale data center, and the reason for the difference was not found. | Dempa Digital (Dempa Shimbun) |
| Power capacity | more than 300 MW | Planned · Campus · Grid connection | 2023-11-07 | Projected future receiving capacity; SoftBank's 2025 groundbreaking article repeats a capacity expected to exceed 300 MW. | SoftBank Corp.; Dempa Digital (Dempa Shimbun); SoftBank Corp. |
| Investment | more than 65,000,000,000 JPY | Reported · Campus | 2023-11-07 | Total project cost reported by trade press at the subsidy announcement; the government subsidy covers about half. | Dempa Digital (Dempa Shimbun) |
| Investment | about 65,000,000,000 JPY | Reported · Campus | 2025-04-30 | W.Media | |
| Land area | about 70 hectares | Planned · Campus | 2025-05-01 | Reported as about 700,000 square meters at full build-out. | SoftBank Corp.; SoftBank Corp.; SoftBank Corp. (SoftBank News) |
Companies and organizations
| Name | Role | Notes | Sources |
|---|---|---|---|
| SoftBank Corp. | Developer | SoftBank Corp.; SoftBank Corp. (SoftBank News); SoftBank Corp. (SoftBank News); SoftBank Corp. (SoftBank News) | |
| IDC Frontier Inc. | Developer | SoftBank subsidiary; co-selected with SoftBank as development operator under the subsidy program and named as co-builder at groundbreaking. | SoftBank Corp.; SoftBank Corp. (SoftBank News) |
| Ministry of Economy, Trade and Industry (Japan) | Government | Provides a subsidy under its FY2023 regional data center program; trade press reported a maximum of 30 billion yen, about half the project cost. | Dempa Digital (Dempa Shimbun); W.Media; SoftBank Corp. (SoftBank News) |
| SB Power Corp. | Power supplier | SoftBank Corp. | |
| Hokkaido Electric Power Company | Power supplier | SoftBank Corp. |
Timeline
| Date | Event | Actual or planned | Notes | Sources |
|---|---|---|---|---|
| 2023-11-07 | Announced | Actual | Plan announced as SoftBank and IDC Frontier were selected for the government subsidy. | SoftBank Corp.; Dempa Digital (Dempa Shimbun) |
| 2025-04-15 | Construction started | Actual | Groundbreaking ceremony. | SoftBank Corp. (SoftBank News); W.Media |
| 2027-03 | First operational | Planned | SoftBank targets opening in fiscal 2026, which ends in March 2027; the date shown is the end of that window. | SoftBank Corp.; SoftBank Corp. (SoftBank News); SoftBank Corp. (SoftBank News) |
Power supply
| Type | Description | Sources |
|---|---|---|
| Grid | Electricity to be supplied through SoftBank's retail subsidiary SB Power and Hokkaido Electric Power. | SoftBank Corp. |
| Other | SoftBank plans to run the facility on 100% renewable electricity procured within Hokkaido. | SoftBank Corp.; SoftBank Corp.; SoftBank Corp. (SoftBank News) |
Sources for these details
- 次世代社会インフラ構想の要となる大規模な計算基盤を備えたデータセンター「Core Brain」を構築 — SoftBank Corp.; 2023-11-07 · Archived source
- 経産省、北海道苫小牧市のデータセンターに300億円補助 ソフトバンクが建設予定 — Dempa Digital (Dempa Shimbun); 2023-11-07
- 北海道苫小牧データセンター — SoftBank Corp.; publication date not stated · Archived source
- Laying the Foundation for the AI Era: Construction Begins on "Hokkaido Tomakomai AI Data Center" — SoftBank Corp. (SoftBank News); 2025-05-01
- SoftBank breaks ground for AI data center in Hokkaido — W.Media; 2025-04-30
- Building for the AI Era: An Inside Look at SoftBank Corp.'s Next-generation AI Data Center in Hokkaido — SoftBank Corp. (SoftBank News); 2026-02-25 · Archived source
- SoftBank Corp.'s 40th Annual General Meeting of Shareholders: Building on Telecommunications Foundation to Unlock Potential of AI — SoftBank Corp. (SoftBank News); 2026-06-23 · Archived source
- Companies
- Developer: SoftBank Corp. (unknown scope) evidence
- Developer: SoftBank Corp. (unknown scope) evidence
- Developer: SoftBank Corp. (unknown scope) evidence
- Developer: SoftBank Corp. (unknown scope) evidence
- Developer: IDC Frontier Inc. (unknown scope) evidence
- Developer: IDC Frontier Inc. (unknown scope) evidence
- Government: Ministry of Economy, Trade and Industry (Japan) (unknown scope) evidence
- Government: Ministry of Economy, Trade and Industry (Japan) (unknown scope) evidence
- Government: Ministry of Economy, Trade and Industry (Japan) (unknown scope) evidence
- Power Supplier: SB Power Corp. (unknown scope) evidence
- Power Supplier: Hokkaido Electric Power Company (unknown scope) evidence
Source and location review
- Status source
- SoftBank News (October 21, 2026): woodland on the Hokkaido Tomakomai AI Data Center site certified as a nature-coexistence site evidence row
SoftBank Corp. · published 2026-10-21 · Company disclosure - Locator
- Locality reference only · Compiled location reference · locality evidence
- Source checks
Not reviewed against imagery not_
reviewed
No imagery review is recorded for this project. Its status rests only on the dated authoritative source. · no independent imagery verificationStatus age at review: 6 days before the data update on 2026-10-27
Location details
- Coordinates
- 42.63410, 141.60550
- Geometry licence
- source-terms-not-recorded
- Use scope
- Locality reference only
- Scope class
- locality
- Authority
- Compiled location reference
- Source entity
- Project
- Method
- imported_reference_point
- Derivation
- imported_reference_point
- Precision scope
- Sources name Tomakomai City only; coordinates are the OpenStreetMap Nominatim centroid of the city boundary.
- Horizontal uncertainty
Not reported
The source record provides no measured horizontal uncertainty; original coordinate precision and note are preserved.
- Geometry evidence
- d00b5a09
A locator places the site on the map. It is not a building footprint, a construction extent or a surveyed boundary unless the use scope is an official boundary, and even then it is a parcel or permit boundary.
Evidence
Sources are linked, not redistributed; each keeps its own terms. An archived copy is a lookup for the Wayback Machine capture nearest the retrieval date and may be unavailable or differ from what was reviewed. Each hash states what it covers; imported factual records are not publisher-page captures.
| Title | Publisher | Roles | Published | Retrieved | Licence | Attribution | Content hash (SHA-256) |
|---|---|---|---|---|---|---|---|
| Building for the AI Era: An Inside Look at SoftBank Corp.'s Next-generation AI Data Center in Hokkaido Archived copy | SoftBank Corp. (SoftBank News) Company disclosure | Imported: Record, Imported: Status, Milestone: First Operational, Role: Developer, Role: Government | source-terms-not-recorded | SoftBank Corp. (SoftBank News) | 271fe43961156ea91376cbe4bf61fcbde647e880dbc849fc15376364f53adf33Factual source record; not the publisher page | ||
| Laying the Foundation for the AI Era: Construction Begins on "Hokkaido Tomakomai AI Data Center" Archived copy | SoftBank Corp. (SoftBank News) Company disclosure | Imported: Geometry, Imported: Record, Metric: Land Area, Milestone: Construction Started, Milestone: First Operational, Power Source: Other, Role: Developer | source-terms-not-recorded | SoftBank Corp. (SoftBank News) | 72355ba32f5b328c8bee706475f5381b29d2d5713dcf208b8876247af9bc1591Factual source record; not the publisher page | ||
| SoftBank breaks ground for AI data center in Hokkaido Archived copy | W.Media Trade publication | Imported: Geometry, Imported: Record, Metric: Investment, Metric: Power Capacity, Milestone: Construction Started, Role: Government | source-terms-not-recorded | W.Media | e7becffca6172d3d4b6ce53064485694e7e25aef0d5adf22ead520d25019705cFactual source record; not the publisher page | ||
| SoftBank Corp.'s 40th Annual General Meeting of Shareholders: Building on Telecommunications Foundation to Unlock Potential of AI Archived copy | SoftBank Corp. (SoftBank News) Company disclosure | Imported: Record, Imported: Status, Role: Developer | source-terms-not-recorded | SoftBank Corp. (SoftBank News) | d228033f8c9504b67653fcf29e33ac0402fc8380a31db5d8856b6805b7db5d68Factual source record; not the publisher page | ||
| SoftBank News (October 21, 2026): woodland on the Hokkaido Tomakomai AI Data Center site certified as a nature-coexistence site Archived copy | SoftBank Corp. Company disclosure | Physical status | all-rights-reserved | SoftBank Corp. | 55d90c284ce3d5d1b548e34202b7bb82cc4af03e00d9f2c60302e6f143165880Retained source material; see source provenance | ||
| SoftBank news: Tomakomai construction progressing and nature coexistence Archived copy | SoftBank Corp. Company disclosure | Physical status | all-rights-reserved | SoftBank Corp. | 1682e713ba8080ad7a8a47c4e2bd4c9a802b291d8e89e858383601b8a978dd70Retained source material; see source provenance | ||
| 北海道苫小牧データセンター Archived copy | SoftBank Corp. Company disclosure | Imported: Record, Metric: Land Area, Metric: Power Capacity, Power Source: Other | not stated | source-terms-not-recorded | SoftBank Corp. | 06cb4ee391bcedc7642bede6f36e155b9fc9573bb5b8ccb27ab30d2c95ace43aFactual source record; not the publisher page | |
| 次世代社会インフラ構想の要となる大規模な計算基盤を備えたデータセンター「Core Brain」を構築 Archived copy | SoftBank Corp. Company disclosure | Imported: Geometry, Imported: Record, Metric: Land Area, Metric: Power Capacity, Milestone: Announced, Milestone: First Operational, Power Source: Grid, Power Source: Other, Role: Developer, Role: Power Supplier | source-terms-not-recorded | SoftBank Corp. | db96655f695b85ec7edc705d6d31c0408d08a979110715e563946f0e1435af22Factual source record; not the publisher page | ||
| 経産省、北海道苫小牧市のデータセンターに300億円補助 ソフトバンクが建設予定 Archived copy | Dempa Digital (Dempa Shimbun) Trade publication | Imported: Record, Metric: Investment, Metric: Power Capacity, Milestone: Announced, Role: Government | source-terms-not-recorded | Dempa Digital (Dempa Shimbun) | e3e54ebeb8e638d6c0a011c8a5a46cb1b0f4f2022a880312d4d665c9a2fdd2a1Factual source record; not the publisher page |
Cite this site
Kyars, K. (2026). SoftBank Hokkaido Tomakomai AI Data Center [site vcc-site-6fc591eaf0edc175a75c]. In Data Center Atlas (2026-10-27) [Data set]. https://kiankyars.github.io/datacenter-atlas/sites/vcc-site-6fc591eaf0edc175a75c/
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