Compute Institute
Ratings for the physical buildout of AI
AirTrunk TOK1 (Inzai, Tokyo East)

AirTrunk TOK1 (Inzai, Tokyo East)

Operating
Confirmed

Jurisdiction: Japan

Inzai, Chiba Prefecture (Tokyo East availability zone) — Japan's largest hyperscale campus, scalable to 300+MW; opened Nov 2021 at 60+MW; 40+MW DC4 phase broke ground Jun 2025 (¥191.6B/$1.24B green-loan financed).

Capacity
GPUs (est.)
Capex
Announced
Target operational

Delivery health score

58 /100
58/100

Methodology prs-v0.1 · computed · trigger: scheduled

Schedule

60 /100
60/100

Regulatory

50 /100
50/100

Infrastructure

60 /100
60/100

Capital

50 /100
50/100

Why this score — factor breakdown

Each factor below contributed to the current score. Contributions are rubric weights from methodology prs-v0.1; every factor cites the record it is derived from.

Dimension
Factor
Contribution
Cites
Narrative
Capital staleness decay +10 AirTrunk TOK1 (Inzai, Tokyo East) Newest capital evidence is 2021-11-30 (freshness window 12 months) — score drifts one rubric level toward the stage-default prior of 50 (§B.4: silence is information).
Regulatory staleness decay -20 AirTrunk TOK1 (Inzai, Tokyo East) Newest regulatory evidence is 2021-11-30 (freshness window 9 months) — score drifts one rubric level toward the stage-default prior of 50 (§B.4: silence is information).
Capital baseline 40 AirTrunk TOK1 (Inzai, Tokyo East) No committed capital evidenced on any entity role — announcement-only anchor region (§B.2.4).
Infrastructure baseline 70 AirTrunk TOK1 (Inzai, Tokyo East) No-adverse-evidence infrastructure baseline (disclosed config, scoring.prs.baselines).
Infrastructure interconnection progress +15 Commissioning Power/interconnection milestone "Commissioning" achieved on 2021-11-30 — largest single health event (§B.2.3).
Infrastructure staleness decay -25 AirTrunk TOK1 (Inzai, Tokyo East) Newest infrastructure evidence is 2021-11-30 (freshness window 9 months) — score drifts one rubric level toward the stage-default prior of 50 (§B.4: silence is information).
Regulatory baseline 70 AirTrunk TOK1 (Inzai, Tokyo East) No-adverse-evidence regulatory baseline (disclosed config, scoring.prs.baselines).
Schedule baseline 80 AirTrunk TOK1 (Inzai, Tokyo East) No-adverse-evidence schedule baseline (disclosed config, scoring.prs.baselines).
Schedule milestone achieved +5 Commissioning Milestone "Commissioning" achieved on/ahead of its first announced date (2021-11-30).
Schedule staleness decay -25 AirTrunk TOK1 (Inzai, Tokyo East) Newest schedule evidence is 2021-11-30 (freshness window 6 months) — score drifts one rubric level toward the stage-default prior of 50 (§B.4: silence is information).

Milestones

  1. Commissioning

    Achieved

    Commissioning · Actual:

Constraint observations

No active constraint observations recorded against this project.

Entities & roles

Entity
Role
Ownership
Committed capital
AirTrunk
Operator

Sources & citations

Every substantive field on this record is backed by a canonical claim from a cited source document, graded on the E1 (strongest) – E5 (weakest) evidence ladder.

  1. AirTrunk · Nov 30, 2021 · backs: actual date, status

    https://airtrunk.com/airtrunk-powers-the-cloud-in-japan-opening-300mw-tokyo-hyperscale-data-centre/

Signals

Recent ingested source documents linked to this project via extracted claims or triage mentions, newest first.

  1. · AirTrunk · relevance 0.90