Japan / Facility

Colt Tokyo Inzai 5 Data Centre

32 MWIT loadIntended completed Inzai 5 facility · 2026-10-09

Tokyo Inzai 5 Data Centre · Colt印西データセンター５ · Inzai5

Under Construction

Colt DCS's fifth named Inzai development, with 32 MW of intended IT capacity. Japanese operator material describes construction underway, while the English page retains planned-development wording. Trade reporting locates the Inzai5 project near Chiba New Town Chuo station, separately from the older Otsuka facilities. Completion targets and capacity figures differ between sources; operation is not established.

Last researched 2026-10-09Last verified Not independently verifiedPublished revision 1

No approved site photo yet. Photos and their source dates are published after evidence review.

Site profile

Operator: Colt Data Centre Services
Ownership: Unknown / not established
Business model / scale: Colocation / Hyperscale
Region / metro: Chiba Prefecture / Tokyo
City / locality: Inzai
Address: 1-2-1 Chuo-kita, Inzai, Chiba, Japan
Location: Property address supported by construction reporting; no sourced property point or matched Google Maps marker established.
Precision: unknown
Parent: Not assigned

Capacity evidence

Statements retain their dates, definitions and development scope. Do not add these rows together.

Claim / measurement	Scope and status	As of	Evidence and accounting
32 MW IT load	Intended completed Inzai 5 facility Planned · cumulative	2026-10-09	Reported claim ↗ Excluded from capacity totals. Undated operator page observed on retrieval date; intended completion capacity, not operational load. Facility is reported under construction separately.
28.8 MW IT load	Inzai 5; phase scope unspecified Planned · unclear	2026-10-09	Conflicting claim ↗ Excluded from capacity totals. Undated secondary compilation observed on retrieval date. IT notation conflicts with table receiving-capacity heading and operator's 32 MW; no reconciliation established.

Development timeline

2026-01 · planned_construction_start
Earlier construction-start target
April 2025 construction report targeted mid-January 2026 commencement; actual start date unconfirmed.
Supporting source ↗
2028-02 · planned_completion
Earlier building-completion target
Construction report targeted completion at the end of February 2028.
Supporting source ↗
mid-2028 · planned_completion
Delivery-team completion target
Public Colt delivery-related post gives mid-2028 completion; exact post date unavailable.
Supporting source ↗
2028 autumn · planned_opening
Conflicting secondary opening target
Secondary compilation gives autumn 2028; opening may differ from building completion, but this is not established.
Supporting source ↗

Disclosed specifications

Gross floor area

30,159 m²

Operator's intended facility figure; differs from earlier construction reporting.

Source ↗

Earlier reported gross floor area

Approximately 30,500 m²

April 2025 construction plan; discrepancy with operator figure unresolved.

Source ↗

Site area

10,060 m²

Construction trade report for Chuo-kita Inzai5 property.

Source ↗

Building form

Steel structure; six floors plus one rooftop level; 52.70 m height

Reported construction plan, not as-built verification.

Source ↗

Resilience design

Colt tier 3 specification; base-isolation building

Design intentions; no independent Uptime certification established.

Source ↗

Cooling

Hybrid cooling

Delivery-related public post; technical configuration and rack density undisclosed.

Source ↗

Connectivity

Carrier-neutral offering

Operator describes intended national and international carrier choice; site-specific commissioned carriers not established.

Source ↗

Project entity and designer

Inzai Five SPC; NTT Facilities

Trade report identifies project entity and designer; legal ownership not inferred.

Source ↗

Public sales telephone

03 4560 4567

Japanese operator page's general sales contact, not a confirmed facility-specific contact.

Source ↗

Sources and references

Source attribution does not imply independent verification or permission to reuse images.

Tokyo Inzai 5 Hyperscale Data Centre in Japan | Colt DCS ↗

Published Date unavailable · Retrieved 2026-10-09

Operator identifies acquired Inzai land, fifth city site, intended 32 MW IT capacity, hyperscale customer offering, floor area and design features; wording remains prospective.

Colt 印西データセンター5 | Colt DCS ↗

Published Date unavailable · Retrieved 2026-10-09

Japanese operator page describes construction underway and first-phase development on acquired land; identifies Japan and Inzai, with 32 MW intended IT capacity.

【千葉ニュータウンに3万㎡DC】設計はNTTファシ、1月着工目指す/印西ファイブ ↗

Published 2025-04-07 · Retrieved 2026-10-09

Construction trade report, displaying last update April 7, 2025, identifies Inzai5 at Chuo-kita 1-2-1, east of Aeon Mall, with Inzai Five SPC as project entity and NTT Facilities as designer; records prospective January 2026 start and February 2028 completion.