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AirTrunk TOK1 East Tokyo

Inzai, Chiba Prefecture, 12, JapanPartially operational
Capacity
60 MW
Operating critical IT
Lead participant
AirTrunk
Operator
Last updated
Aug 25, 2026
Most recent public record update

About AirTrunk TOK1 East Tokyo

TOK1 is a 300+ MW design campus with more than 60 MW operating at its 2021 opening and substantial later phases under construction. AirTrunk TOK1 East Tokyo is located in Inzai, Chiba Prefecture, 12, JP and is a data center campus in partially operational status. Participants include AirTrunk as operator. Published specifications include 50 MW of stated capacity. Development comprises TOK1 initial operating phases (operating), TOK1 phase 3 (construction), TOK1 subsequent phases (construction). Key milestones include TOK1 subsequent phase breaks ground (2025-06-19) and AirTrunk announces TOK1 green loan (2026-03-10). electricity supply — 66 kV: Dual/onsite high-voltage supply and substations reported for the campus; exact current energized MW is undisclosed. Capital records include green loan of 191.6 JPY billion for TOK1-only refinancing of existing facilities and development capex for next phases. Company equivalent USD1.24 billion.

Program relationships

1 linked
AirTrunk Tokyo Platform

Program record

Capacity

Operating critical IT
Operating capacity—An operating IT-capacity figure has not been publicly disclosed.
Design300 MWReported Rounded · AirTrunk TOK1 East Tokyo
It Load60 MWReported Rounded · AirTrunk TOK1 East Tokyo

Development

3 phases · 5 milestones
TOK1 initial operating phasesOperational

Historical operating minimum at November 2021 opening; not a current full-campus total.

TOK1 phase 3Under Construction

Announced as 55+ MW and later described as 50 MW; figures conflict.

1 building

TOK1 subsequent phasesUnder Construction

Includes a 40+ MW phase announced in June 2025; scopes may overlap and are not additive.

Nov 30, 2021
TOK1 initial phases exceeding 60 MW open
Completed
Jun 30, 2023
TOK1 phase 3 breaks ground
Completed
Aug 14, 2024
TOK1 phase 3 tops out
Completed
Jun 19, 2025
TOK1 subsequent phase breaks ground
Completed
Mar 10, 2026
AirTrunk announces TOK1 green loan
Completed

Infrastructure

Electric GridOperational

66 kV

Dual/onsite high-voltage supply and substations reported for the campus; exact current energized MW is undisclosed.

Project map

0 of 1 project point mapped
Infrastructure facts
1
Mapped records
1
Capacity figures
1

No map point available

Power & interconnection: 1

Facts & sources

Published claims and their source links.

23 facts
Facility Code
TOK1
Actual
AirTrunkAirTrunk opens TOK1 East TokyoAirTrunkTOK1 East Tokyo data center
Campus Location
Inzai, Chiba Prefecture
Actual
AirTrunkAirTrunk opens TOK1 East TokyoAirTrunkTOK1 East Tokyo data center
Total Design Capacity
300 MW+
Reported Rounded
Data Center DynamicsAirTrunk breaks ground on 40 MW expansion at Tokyo campusAirTrunkAirTrunk opens TOK1 East TokyoAirTrunkTOK1 East Tokyo data center
Initial Operating Capacity Minimum
60 MW+
Reported Rounded
Data Center DynamicsAirTrunk breaks ground on 40 MW expansion at Tokyo campusAirTrunkAirTrunk opens TOK1 East Tokyo
Opened Date
2021-11-30
Actual
AirTrunkAirTrunk opens TOK1 East Tokyo
Campus Land Area
13.25 hectares
Reported Rounded
AirTrunkAirTrunk opens TOK1 East Tokyo
Current Site Area
13 hectares
Reported Rounded
AirTrunkTOK1 East Tokyo data center
Data Hall Area
80,000 square meters
Reported Rounded
AirTrunkTOK1 East Tokyo data center
Office Storage Area
9,600 square meters
Reported Rounded
AirTrunkTOK1 East Tokyo data center
Data Hall Count
102 data halls
Reported Rounded
AirTrunkTOK1 East Tokyo data center
Planned Building Count
7
Reported Rounded
AirTrunkAirTrunk opens TOK1 East Tokyo
Grid Voltage
66 kV
Reported Rounded
AirTrunkAirTrunk opens TOK1 East TokyoAirTrunkTOK1 East Tokyo data center
Design Pue
1.15 PUE
Reported Rounded
AirTrunkAirTrunk opens TOK1 East TokyoAirTrunkTOK1 East Tokyo data center
Carrier Neutral
True
Actual
AirTrunkTOK1 East Tokyo data center
Phase 3 Topped Out
True
Actual
AirTrunkTOK1 phase 3 progressing at speed
Phase 3 Ready For Service Verified
False
Actual
AirTrunkTOK1 phase 3 progressing at speed
New Phase Groundbreaking
2025-06-19
Actual
AirTrunkAirTrunk breaks ground on 40+ MW TOK1 phase
Current Operating Capacity Disclosed
False
Actual
AirTrunkAirTrunk secures JPY191.6 billion green loan for TOK1AirTrunkTOK1 East Tokyo data center
Financing Amount Jpy
191.6 JPY billion
Reported Rounded
AirTrunkAirTrunk secures JPY191.6 billion green loan for TOK1
Financing Amount Usd
$1.24 billion
Reported Rounded
AirTrunkAirTrunk secures JPY191.6 billion green loan for TOK1
Financing Scope
Refinancing existing facilities and development capex for next phases
Actual
AirTrunkAirTrunk secures JPY191.6 billion green loan for TOK1
Financing Applies To Tok2
False
Actual
AirTrunkAirTrunk secures JPY191.6 billion green loan for TOK1
Phase 3 Customer Named
False
Actual
AirTrunkAirTrunk breaks ground on third phase of TOK1