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CARTIS

AirTrunk TOK1 East Tokyo

Inzai, Chiba Prefecture, Chiba, JapanPartially operational
Evidence
Planned / design
300 MW+
Updated
Oct 28, 2026

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.

Program relationships

AirTrunk Tokyo Platform · Program

Capacity

Total design capacity

Planned / design or future potential

300 MW+

Source

Initial operating capacity minimum

Reported rounded

60 MW+

Not included in reviewed operating IT capacity

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

TOK1 initial operating phasesOperational

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

TOK1 phase 3Under construction

1 building

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

TOK1 subsequent phasesUnder construction

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

Milestones (5)
TOK1 initial phases exceeding 60 MW open

Nov 30, 2021 · Recorded actual event

Completed · Event type not stated

Source not linked
TOK1 phase 3 breaks ground

Jun 30, 2023 · Recorded actual event

Completed · Construction started

Source not linked
TOK1 phase 3 tops out

Aug 14, 2024 · Recorded actual event

Completed · Status changed

Source not linked
TOK1 subsequent phase breaks ground

Jun 19, 2025 · Recorded actual event

Completed · Construction started

Source not linked
AirTrunk announces TOK1 green loan

Mar 10, 2026 · Recorded actual event

Completed · Financing

Source not linked

Participants

AirTrunk

Operator

Sources by role
Operator (1)
Operator (1)
Other participants (12)
BNP Paribas

Lender

Sources by role
Lender (1)
Chiba Bank

Lender

Sources by role
Lender (1)
Credit Agricole CIB

Lender

Sources by role
Lender (1)
DBS Bank

Lender

Sources by role
Lender (1)
E.SUN Commercial Bank

Lender

Sources by role
Lender (1)
Mizuho Bank

Lender

Sources by role
Lender (1)
MUFG

Lender

Sources by role
Lender (1)
Natixis CIB

Lender

Sources by role
Lender (1)
OCBC

Lender

Sources by role
Lender (1)
SMBC

Lender

Sources by role
Lender (1)
Societe Generale

Lender

Sources by role
Lender (1)
UOB

Lender

Sources by role
Lender (1)

Capital & incentives

Capital claims and financing records may overlap. Their amounts are not added together.

Capital claims

Financing amount jpy

Reported rounded

191.6 JPY billion

Source

Financing amount USD

Reported rounded

$1.24 billion

Source

Financing scope

Actual

Refinancing existing facilities and development capex for next phases

Source

Financing applies to tok2

Actual

False

Source

Financing records

Green loan

¥191,600,000,000

Mar 10, 2026

TOK1-only refinancing of existing facilities and development capex for next phases. Company equivalent USD1.24 billion.

Parties & sources

AirTrunk (Financing sponsor / borrower group; legal borrower undisclosed) · BNP Paribas (Mandated lead arranger and bookrunner) · Chiba Bank (Mandated lead arranger and bookrunner) · Credit Agricole CIB (Global coordinator and mandated lead arranger/bookrunner) · DBS Bank (Mandated lead arranger and bookrunner) · E.SUN Commercial Bank (Mandated lead arranger and bookrunner) · Mizuho Bank (Mandated lead arranger and bookrunner) · MUFG (Global coordinator and mandated lead arranger/bookrunner) · Natixis CIB (Mandated lead arranger and bookrunner) · OCBC (Mandated lead arranger and bookrunner) · SMBC (Global coordinator and mandated lead arranger/bookrunner) · Societe Generale (Global coordinator and mandated lead arranger/bookrunner) · UOB (Mandated lead arranger and bookrunner)

Sources (1)

Site & development

Campus location

Actual

Inzai, Chiba Prefecture

Source

Campus land area

Reported rounded

13.25 hectares

Source

Current site area

Reported rounded

13 hectares

Source

Data hall area

Reported rounded

80,000 square meters

Source

Office storage area

Reported rounded

9,600 square meters

Source

Planned building count

Reported rounded

7 buildings

Source

Technical specifications

Grid voltage

Reported rounded

66 kV

Source

Additional project facts

Facility code

Actual

TOK1

Source

Opened date

Actual

2021-11-30

Source

Data hall count

Reported rounded

102 data halls

Source

Design PUE

Reported rounded

1.15 PUE

Source

Carrier neutral

Actual

True

Source

Phase 3 topped out

Actual

True

Source

Phase 3 ready for service verified

Actual

False

Source

New phase groundbreaking

Actual

2025-06-19

Source

Current operating capacity disclosed

Actual

False

Source

Phase 3 customer named

Actual

False

Source

Infrastructure & permits

Technical details (1)
Electric grid

Operational

66 kV

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

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