Published specificationsOperation announced
AirTrunk TOK1
Inzai City, Chiba Prefecture
Multi-building hyperscale campus in Inzai City. Official capacity exceeds 300 MW campus-wide, expanding while operational.
CapacityNot verified
Rack powerCampus total over 300 MW (initial phase over 60 MW)
Cooling methodFree air cooling
Published specifications
- it capacity
- 300MW+Total for multi-building campus · Not a single-building value
- initial phase capacity
- 60MW+Initial phase at opening in 2021
- data halls
- 102hallCampus
- Cooling
- free-air coolingTOK1 campus · Water-saving design
Differences between published sources
- Area values are not adopted because descriptions differ: the official Japanese facility page states technical data hall area is 56,000 m2, whereas the English facility page states data hall area is 80,000 m2.
Notes
- Over 300 MW is the total for the multi-building campus.
- Total rack count and power per rack are not verified from official public information.
- Basis for medium-scale or larger adoption: Confirmed on the official facility page that the multi-building TOK1 campus has a total capacity of over 300 MW, meeting the IT capacity criterion.
Phone number for the Japan location and email contacts for general and customer inquiries are published
SourcesPublic sources supporting this listing
- Source 1airtrunk.com/ja/location/tok1-%E6%9D%B1%E4%BA%AC/Checked 2026-09-23 (Source date 2026-09-23)
- Source 2airtrunk.com/airtrunk-powers-the-cloud-in-japan-opening-300mw-tokyo-hyperscale-data-centre/Checked 2026-09-23 (Source date 2021-11-30)
- Source 3airtrunk.com/wp-content/uploads/2025/10/AT_Sustainability-Report-2025-Final.pdfChecked 2026-09-23 (Source date FY2025)