SoftBank Tomakomai AI Data Center

Tomakomai, Hokkaido, JapanUnder construction

Planned / design: 300 MW
Updated: Oct 28, 2026

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

Reported capacity

Design

300 MW

Source

Capacity

Planned / design or future potential

300 MW

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Construction programUnder construction

SoftBank Tomakomai AI Data Center: Under construction.

Milestones (2)

SoftBank Tomakomai AI Data Center: Under construction; initial 50 MW-scale opening targeted in fiscal 2026.

May 1, 2025 · Event timing type not established

In progress · Construction started

Source not linked

SoftBank Tomakomai AI Data Center — Under construction

Date not disclosed · Event timing type not established

In progress · Status changed

Source not linked

Participants

SoftBank Corp.

Developer

Sources by role

Developer (1)

Toward the Completion of a Large-scale AI Data Center in Tomakomai · May 1, 2025 · Primary

Technical details (2)

Electric grid

Planned or represented

300 MW

300 MW planned or design IT capacity

Site facility

Planned or represented

AI-focused facility designed to use Hokkaido renewable power and support advanced cooling.

Public-source research. Plans may change. See Evidence for sources and qualifications.