All records
Data center siteSite record
SoftBank Tomakomai AI Data Center
Tomakomai, Hokkaido, JapanUnder construction
Capacity
300 MW
Planned / design
Lead participant
SoftBank Corp.
Developer
Last updated
Aug 27, 2026
Most recent public record update
About SoftBank Tomakomai AI Data Center
SoftBank is constructing an AI data center in Tomakomai, Hokkaido. The company targets an initial 50 MW-scale facility in fiscal 2026 and states that the site is intended to expand beyond 300 MW of future receiving capacity. AI-focused facility designed to use Hokkaido renewable power and support advanced cooling.
Capacity
Planned / designOperating capacity—An operating IT-capacity figure has not been publicly disclosed.
Utility Service300 MWDesign · SoftBank Tomakomai AI Data Center
Future Potential300 MWDesign · SoftBank Tomakomai AI Data Center
Development
1 phases · 2 milestonesConstruction programUnder Construction
SoftBank Tomakomai AI Data Center: Under construction.
May 1, 2025
SoftBank Tomakomai AI Data Center: Under construction; initial 50 MW-scale opening targeted in fiscal 2026.
In Progress—
SoftBank Tomakomai AI Data Center — Under construction
In ProgressInfrastructure
Electric GridPlanned Or Represented
300 MW
300 MW planned or design IT capacity
Site FacilityPlanned Or Represented
AI-focused facility designed to use Hokkaido renewable power and support advanced cooling.
Project map
0 of 1 project point mappedInfrastructure facts
2
Mapped records
1
Capacity figures
1
No map point available
Power & interconnection: 1Site systems: 1
Facts & sources
Published claims and their source links.
Location ContextSoftBank AI data center | Tomakomai | Hokkaido | JapanActual
SoftBank AI data center | Tomakomai | Hokkaido | Japan
Lifecycle StatusConstructionActual
Construction
Reported Capacity300 MWDesign
300 MW
Capacity BasisSource states future receiving capacity will exceed 300 MW; stored floor valueActual
Source states future receiving capacity will exceed 300 MW; stored floor value
Project IdentitySoftBank Tomakomai AI Data CenterActual
SoftBank Tomakomai AI Data Center
Lifecycle StatusUnder constructionActual
Under construction
LocationTomakomai, Hokkaido, JPActual
Tomakomai, Hokkaido, JP
Participant RolesSoftBankActual
SoftBank
Capacity300 MWDesign
300 MW
Capacity Basis300 MW planned or design IT capacityActual
300 MW planned or design IT capacity
Development ScaleConstruction underway; initial 50 MW scale in fiscal 2026Actual
Construction underway; initial 50 MW scale in fiscal 2026
InfrastructureAI-focused facility designed to use Hokkaido renewable power and support advanced cooling.Actual
AI-focused facility designed to use Hokkaido renewable power and support advanced cooling.