Japan / Facility
Inzai 4 · Colt 印西データセンター4 · Colt Tokyo Inzai Four
Colt-operated hyperscale facility in Inzai, Chiba, serving the Tokyo market. Phase one was operational at 4.8 MW on 2025-02-26; ultimate design capacity is 20 MW IT. Developed under the Fidelity Investments–Mitsui joint venture and fully pre-let. Remaining buildout completion is unconfirmed.
Statements retain their dates, definitions and development scope. Do not add these rows together.
| Claim / measurement | Scope and status | As of | Evidence and accounting |
|---|---|---|---|
| 4.8 MW Unspecified power | Inzai 4 first phase Operational · cumulative | 2025-02-26 | Reported claim ↗ Excluded from capacity totals. Operational capacity at the announcement date; release does not explicitly label this figure IT or facility power. |
| 20 MW IT load | Inzai 4 ultimate facility buildout Planned · cumulative | 2025-02-26 | Reported claim ↗ Excluded from capacity totals. Announcement-date ultimate capacity, not additional to 4.8 MW. IT basis is explicitly identified by the facility page and datasheet. Full delivery remains unconfirmed. |
Industry coverage reports groundbreaking for Inzai 4 in April 2023.
Supporting source ↗Operator announced first-phase completion and 4.8 MW operational capacity.
Supporting source ↗Secondary coverage retains this forecast despite a displayed 2026 update; no actual completion evidence established.
Supporting source ↗Development relationship does not establish the legal property owner.
Source ↗Industry coverage places it approximately 600 m from the earlier campus; no parent record manufactured.
Source ↗Datasheet identifies land area. Facility page also labels the same figure white space; 2023 reporting rounds site area to 8,750 m². White-space area unresolved.
Source ↗Disclosed design specification.
Source ↗Datasheet specification, not independently tested.
Source ↗Describes air-conditioning infrastructure, not confirmed direct liquid cooling of servers.
Source ↗Specific carriers and installed network capacity undisclosed.
Source ↗Design statement; independent Tier certification not established.
Source ↗Operator's Global Reference Design description, not measured environmental outcomes.
Source ↗Japan business contact printed in datasheet; no contact initiated.
Source ↗Source attribution does not imply independent verification or permission to reuse images.
Published Date unavailable · Retrieved 2026-10-09
Names Inzai 4, describes Chiba New Town location, fourth campus facility, 20 MW IT upon completion and one cloud customer; retains first-phase construction language.
Published 2025-02-26 · Retrieved 2026-10-09
Operator announces completed first phase with 4.8 MW operational, 20 MW at full buildout, full pre-letting and Fidelity–Mitsui joint-venture development.
Published Date unavailable · Retrieved 2026-10-09
Japanese operator datasheet identifies Inzai City, Chiba; describes 8,747 m² land, five floors, seismic isolation, IT power, resilience, cooling and connectivity specifications.
Published 2023-04-25 · Retrieved 2026-10-09
Reports construction commencement in Inzai, Chiba, roughly 600 m from the existing campus; approximately 20 MW design and 8,750 m² site.
Published Date unavailable · Retrieved 2026-10-09
Directory uses the Four alias and lists only 2 Chome Otsuka, 270-1352 Inzai City; insufficient for a specific parcel.
Published Date unavailable · Retrieved 2026-10-09
Page displays last update 2026-03-31 but retains a November 2025 completion forecast. Reports 19.8 MW IT and 66 kV supply; underlying event date is unclear.
Published 2025-02-26 · Retrieved 2026-10-09
Industry coverage corroborates first-phase operation at 4.8 MW and future 20 MW total; credits property launch imagery to Colt DCS.
Name: Secure and Accessible Data Centre in Inzai, Japan | Colt DCS; Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4
Aliases: Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4; Colt 印西データセンター4 — データセンターの仕様; Colt Tokyo Inzai Four
Kind: Secure and Accessible Data Centre in Inzai, Japan | Colt DCS; Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4
Country: Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4; Colt 印西データセンター4 — データセンターの仕様
Region: Colt 印西データセンター4 — データセンターの仕様; Colt DCS breaks ground on 20MW facility in Tokyo, Japan
City: Colt 印西データセンター4 — データセンターの仕様; Colt DCS breaks ground on 20MW facility in Tokyo, Japan
Metro: Secure and Accessible Data Centre in Inzai, Japan | Colt DCS; Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4
Operator: Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4; Colt launches data center in Tokyo, Japan
Business Model: Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4; Secure and Accessible Data Centre in Inzai, Japan | Colt DCS
Scale: Secure and Accessible Data Centre in Inzai, Japan | Colt DCS; Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4
Statuses: Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4
Summary: Secure and Accessible Data Centre in Inzai, Japan | Colt DCS; Colt DCS étend sa présence à Tokyo, au Japon, avec le lancement du centre de données Inzai 4; Colt 印西データセンター4 — データセンターの仕様
Location: Secure and Accessible Data Centre in Inzai, Japan | Colt DCS; Colt 印西データセンター4 — データセンターの仕様
Stable identifier: f2485050-fdc1-4f60-bc24-5b34b2c95acb