Japan / Site

Osaka OSK12 Data Center

36 MWIT loadUltimate two-building campus · 2025-05-27

NTT Osaka OSK12 Data Center · Osaka North 1 Data Center · 大阪北データセンター

Under ConstructionPlanned

Two-building NTT campus in Nishiai, Ibaraki, in Japan's Kansai region. The first 18 MW IT phase broke ground in October 2025 and is advertised for delivery in 2028; ultimate campus IT capacity is 36 MW. The second building was announced for completion in 2032. Campus represented once; capacities overlap and must not be added.

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: NTT DATA Global Data Centers
Ownership: Unknown / not established
Business model / scale: Colocation / Hyperscale
Region / metro: Osaka Prefecture / Osaka
City / locality: Ibaraki
Address: Unknown
Location: Operator establishes Nishiai, Ibaraki, Osaka Prefecture; no corroborated property point or full street address.
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
18 MW IT load	First building / first phase Under Construction · incremental	2026-10-09	Reported claim ↗ Excluded from capacity totals. Undated operator page retrieved on as_of date; advertised capacity for 2028 delivery, not operating capacity. Included in campus total.
36 MW IT load	Ultimate two-building campus Planned · cumulative	2025-05-27	Reported claim ↗ Excluded from capacity totals. Announcement date; explicitly describes total IT capacity at completion. Includes first and second buildings, not additional capacity beyond them.
18 MW Unspecified power	Second building Planned · incremental	2025-05-27	Reported claim ↗ Excluded from capacity totals. Announcement date; future second building adds 18 MW in 2032. Paragraph says power without independently specifying its basis; surrounding announcement describes total campus IT load.

Development timeline

2025-05-13 · announcement
Nishiai land acquisition disclosed
Eight acres acquired for two data centers totaling 36 MW; first facility targeted for FY2027.
Supporting source ↗
2025-05-27 · announcement
Osaka North development announced
NTT DATA Group and NTT GDC announce two-building campus.
Supporting source ↗
2025-10-01 · actual_groundbreaking
First building groundbreaking
Operator post reports October 1; dated DCD report establishes 2025 year.
Supporting source ↗
FY2027 second half · planned_service_start
Original first-phase service target
Fiscal-year precision preserved from Japanese announcement.
Supporting source ↗
2028 · planned_delivery
Current advertised first-phase delivery
Undated operator page advertises 2028; operator groundbreaking post specifies early 2028. These are compatible with the original fiscal-year window but actual completion is unconfirmed.
Supporting source ↗
2032 · planned_completion
Second building completion
Schedule in May 2025 announcement; later confirmation not located.
Supporting source ↗

Disclosed specifications

Land

Eight acres

Acquisition disclosure; no precise parcel boundary established.

Source ↗

First-building server space

Approximately 5,000 m²

Planned first-phase server rooms, not campus gross floor area.

Source ↗

Building design

Three stories; seismic isolation

First phase design.

Source ↗

Cooling

N+1 wall-blown air conditioning; air-cooled modular chiller; DLC available

Webpage description. Brochure instead lists a water-cooling system; reconcile before selecting a definitive mechanical specification.

Source ↗

Utility and backup

2N 77 kV utility supply; N+1 diesel generator or gas turbine with 48-hour autonomy; generator and UPS 4N/3

Brochure design claims; generator technology presented as alternatives. Voltage does not establish grid MW.

Source ↗

Connectivity

Carrier-neutral; four building cable entry points; two meet-me rooms

Brochure specifications; IOWN APN implementation is planned in announcement.

Source ↗

Resilience standards

Uptime Tier III and J-Tier 3 equivalent design

Design equivalence; no awarded Uptime certification established.

Source ↗

Prospective certifications

ISO 27001, PCI DSS, SOC 1 Type 2, SOC 2 Type 2

Brochure explicitly says considering obtaining; not established certifications.

Source ↗

Sustainability

Preparing for net-zero operation

Project intent within NTT DATA's corporate targets; no site-specific renewable contract, PUE or achieved net-zero status disclosed.

Source ↗

Public business contact

gdc-pmkj@ntt.com

Product/service marketing contact published in development announcement; no contact made.

Source ↗

Sources and references

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

Global Data Centers: Osaka OSK12 Data Center | NTT DATA ↗

Published Date unavailable · Retrieved 2026-10-09

Operator identifies Nishiai, Ibaraki, Osaka Prefecture; 2028 delivery, 18 MW first phase and planned 36 MW two-building campus. Lists carrier-neutral connectivity, cooling and security.

大阪府での新たなデータセンターの建設について ↗

Published 2025-05-27 · Retrieved 2026-10-09

NTT DATA Group and NTT GDC announce Osaka North: 36 MW total IT capacity; first three-story seismic-isolated building with 18 MW and approximately 5,000 m² server rooms. First service scheduled for FY2027 second half; second building in 2032. Describes developer and sustainability plans.