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Cartis diligence evidence schedule

SoftBank Tomakomai AI Data Center

PRJ-0643 · Site · Tomakomai, Hokkaido, Japan

Record last updated Oct 28, 2026

Scope and capacity

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.

Headline: 300 MW Planned / design

Numbers refer to their stated physical boundaries and are not added together. Source dates, claim dates and record updates have different meanings. Missing dates and locators are not inferred.

Location context · SoftBank AI data center | Tomakomai | Hokkaido | Japan

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 55576 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Lifecycle status · Construction

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 55577 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Reported capacity · 300 MW

Design · SoftBank Tomakomai AI Data Center (Project)

Claim 55578 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Separate claim, not added to the headline

  1. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Capacity basis · Source states future receiving capacity will exceed 300 MW; stored floor value

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 55579 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Project identity · SoftBank Tomakomai AI Data Center

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114687 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Lifecycle status · Under construction

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114688 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Location · Tomakomai, Hokkaido, JP

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114689 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Participant roles · SoftBank

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114690 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Capacity · 300 MW

Planned / design or future potential · SoftBank Tomakomai AI Data Center (Project)

Claim 114691 · Recorded claim type: Design · Review: Approved · Claim date: Not stated

Headline treatment: Selected headline

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Capacity basis · 300 MW planned or design IT capacity

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114692 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Development scale · Construction underway; initial 50 MW scale in fiscal 2026

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114693 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

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

Actual · SoftBank Tomakomai AI Data Center (Project)

Claim 114694 · Recorded claim type: Actual · Review: Approved · Claim date: Not stated

  1. Next-generation infrastructure program

    SoftBank · Document date: Jan 1, 2026 · Corroborating

    Source reference: SRC-6395 · Fact sheet · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/corp/sustainability/materiality/next-gen-infra/

  2. Toward the Completion of a Large-scale AI Data Center in Tomakomai

    SoftBank · Document date: May 1, 2025 · Primary

    Source reference: SRC-3016 · Company announcement · Recorded authority: Party primary

    Source URL

    https://www.softbank.jp/en/sbnews/entry/20250501_01

Counterparties and capital

SoftBank Corp. · Developer · CMP-0706

This schedule captures public Cartis research. It is not a title, lien or legal-opinion report. Document page/section locators and claim review timestamps are included only when published; this version has no separate locator or claim-review-time feed.