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ESR Cosmosquare Data Centre Campus

CloudHQ Cosmosquare · KIX Campus

OperationalPlanned

Three-phase hyperscale campus in Osaka comprising OS1, OS2 and OS3. ESR and CloudHQ jointly develop the campus, with CloudHQ operating OS1. OS1 commenced operations in 2025. Later-phase delivery and competing campus power claims require reconciliation.

Last researched 2026-10-09Last verified Not independently verifiedPublished revision 1
Cosmosquare OS1 exterior, as identified in NTT Facilities' completed-building portfolio; visual suitability not inspected.

Site / building photo

Cosmosquare OS1 exterior, as identified in NTT Facilities' completed-building portfolio; visual suitability not inspected.

Published date unknown · Captured date unknown · Checked 2026-10-09

Research-selected property image; reviewer must confirm site identity, suitability and rights before publication.

waf.ntt-f.co.jp · Source and attribution ↗
Image rights and date notes

Published by NTT Facilities; photographer and capture date not displayed in accessible text. No reusable licence established; obtain permission or confirm applicable reuse terms before import. Publication and capture dates were not independently established.

Site profile

Operator
ESR–CloudHQ joint venture; CloudHQ operates OS1
Ownership
Unknown / not established
Business model / scale
Colocation / Hyperscale
Region / metro
Osaka Prefecture / Osaka
City / locality
Osaka
Address
Nanko Kita 1-chome, Suminoe-ku, Osaka, Japan
Location
Coordinates explicitly published on CloudHQ's KIX campus page; locality corroborated by ESR and Osaka City records. Campus point and boundaries were not independently established; Google Maps was inaccessible.
Precision: approximate · 34.6394, 135.42107
View location on map →
Parent
Not assigned

Location detail

Coordinates explicitly published on CloudHQ's KIX campus page; locality corroborated by ESR and Osaka City records. Campus point and boundaries were not independently established; Google Maps was inaccessible.. Coordinate precision: approximate. Street-map detail does not increase the accuracy of the sourced point.

Nanko Kita 1-chome, Suminoe-ku, Osaka, Japan

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Capacity evidence

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

Claim / measurementScope and statusAs ofEvidence and accounting
130 MW
Facility power
Ultimate campus OS1–OS3
Planned · cumulative
2024-08-29Conflicting claim ↗

Excluded from capacity totals. As of announcement date; ultimate development capacity, not installed operating load. Later report states 162 MW facility load.

25 MW
Facility power
OS1 fully fitted-out facility
Planned · cumulative
2024-08-29Reported claim ↗

Excluded from capacity totals. As of announcement date; explicitly facility load and conditional on fit-out. Included within campus capacity.

25 MW
Grid connection
OS1 receiving capacity
Unknown · cumulative
2024-08-30Reported claim ↗

Excluded from capacity totals. Japanese announcement date; receiving capacity (受電容量), not proof of live IT utilisation. May describe the same underlying 25 MW provision as the facility claim.

19.2 MW
IT load
OS1 design IT capacity
Operational · cumulative
2026-10-09Reported claim ↗

Excluded from capacity totals. As of retrieval of undated facility page; operational status supported separately by s9. Does not establish occupied IT load.

120 MW
IT load
Ultimate three-phase campus
Planned · cumulative
2025-10-08Conflicting claim ↗

Excluded from capacity totals. Announcement date; conflicts with undated CloudHQ 96.4 MW critical IT total. No phase breakdown or reconciliation supplied.

96.4 MW
IT load
Ultimate KIX campus critical IT load
Planned · cumulative
2026-10-09Conflicting claim ↗

Excluded from capacity totals. Retrieval date of undated operator page, not publication date. Page labels both available critical load and total critical IT load 96.4 MW while retaining planned June 2025 RFS wording.

162 MW
Facility power
Cosmosquare campus OS1–OS3
Planned · cumulative
2026-10-09Conflicting claim ↗

Excluded from capacity totals. Retrieval date of report covering 2025 with selected extended content; exact capacity effective date unknown. Campus overview explicitly labels facility load; no explanation of increase from 130 MW.

96 MW
Unspecified power
Original three-phase campus announcement
Planned · cumulative
2022-11-08Conflicting claim ↗

Excluded from capacity totals. Historical announcement date; power basis not explicitly stated. Supersession or redesign not reconciled; do not combine with later claims.

Development timeline

  1. 2022-11-08 · announcement

    OS1 construction announced

    ESR announced commencement of its first Cosmosquare data-centre phase.

    Supporting source ↗
  2. 2024-08-28 · actual

    OS1 building completed

    ESR Japan reports building completion; this precedes service commencement.

    Supporting source ↗
  3. 2025-01-16 · announcement

    ESR–CloudHQ partnership announced

    Joint development and operation announced for the full campus.

    Supporting source ↗
  4. 2025-06 · planned

    OS1 planned readiness

    January 2025 release targeted June, versus May in the earlier release and facility page; actual service month not established.

    Supporting source ↗
  5. 2025 · actual

    OS1 operations commenced

    Confirmed retrospectively in ESR's 2025/2026 sustainability report.

    Supporting source ↗
  6. 2025-10-08 · announcement

    OS1 LEED Gold announced

    LEED v4 BD+C: Data Centres Gold certification announced.

    Supporting source ↗

Disclosed specifications

Campus gross floor area

125,000 sqm

CloudHQ campus marketing figure; completed versus ultimate area not explained.

Source ↗

OS1 site and floor areas — architect

8,068.12 sqm site; 24,507.32 sqm gross floor area

Completed-building portfolio; differs from ESR Japan and municipal figures.

Source ↗

OS1 site and floor areas — developer

8,146 sqm site; 23,922 sqm floor area

August 2024 disclosure; measurement boundaries not reconciled.

Source ↗

OS1 municipal floor area

24,495.77 sqm

Environmental-plan disclosure; differs from architect and developer figures.

Source ↗

OS1 data halls and racks

8 halls; 5,950 sqm; planned 2,688 racks

336 racks per hall; actual installed count and density unknown.

Source ↗

OS1 structure

Five storeys; steel structure; foundation seismic isolation

Building-specific, not campus-wide.

Source ↗

OS1 cooling

Water-cooled chillers and cooling-tower free cooling

Architect describes energy-efficient equipment; no quantified liquid-cooling deployment disclosed.

Source ↗

OS1 PUE claim

Annual average PUE 1.3 or below

Pre-operation developer statement; no measured operational series supplied.

Source ↗

OS1 certification

LEED v4 BD+C: Data Centres Gold

Award announced October 2025; supersedes older targeting wording.

Source ↗

Connectivity

Within 10 km of central Osaka internet and telecom exchanges

Campus marketing claim; carriers, fibre routes and latency measurements undisclosed.

Source ↗

OS1 municipal environmental rating

B+

Osaka building environmental-plan assessment, distinct from LEED.

Source ↗

Sources and references

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

KIX Campus — CloudHQ ↗

Published Date unavailable · Retrieved 2026-10-09

Operator identifies Cosmosquare/KIX campus, explicit coordinates 34.63940,135.42107, 96.4 MW critical IT load, 125,000 sqm and phases KIX1–KIX3.

ESR Data Centre Sustainability Report 2025/2026 ↗

Published Date unavailable · Retrieved 2026-10-09

Report covers calendar 2025, with selected extended content and no external assurance. Confirms OS1 operations commenced in 2025 and lists Cosmosquare OS1–OS3 at 162 MW facility load.

Property photo · waf.ntt-f.co.jp ↗

Published Date unavailable · Retrieved 2026-10-09

Cosmosquare OS1 exterior, as identified in NTT Facilities' completed-building portfolio; visual suitability not inspected. Original image: https://waf.ntt-f.co.jp/architect/shared/esr-cosmosquare-os1/d-01.jpg

Profile field evidence

Name: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan; CloudHQ and ESR announce joint venture to co-develop and operate Cosmosquare campus

Aliases: KIX Campus — CloudHQ

Kind: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan

Country: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan

Region: ESR初のデータセンター「ESRコスモスクエア データセンターOS1」竣工

City: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan; Osaka City environmental plan: provisional ESR Nanko Data Centre

Metro: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan; KIX Campus — CloudHQ

Address: Osaka City environmental plan: provisional ESR Nanko Data Centre

Operator: CloudHQ and ESR announce joint venture to co-develop and operate Cosmosquare campus; CloudHQ and ESR Achieve LEED Gold Certification for Cosmosquare OS1 Data Centre in Japan

Business Model: ESR初のデータセンター「ESRコスモスクエア データセンターOS1」竣工; KIX Campus — CloudHQ

Scale: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan; KIX Campus — CloudHQ

Statuses: ESR Data Centre Sustainability Report 2025/2026; KIX Campus — CloudHQ

Summary: ESR completes phase 1 of its US$2 billion, 130 MW Cosmosquare Data Centre campus in Central Osaka, Japan; CloudHQ and ESR announce joint venture to co-develop and operate Cosmosquare campus; CloudHQ and ESR Achieve LEED Gold Certification for Cosmosquare OS1 Data Centre in Japan; ESR Data Centre Sustainability Report 2025/2026

Location: KIX Campus — CloudHQ; Osaka City environmental plan: provisional ESR Nanko Data Centre

Media: Property photo · waf.ntt-f.co.jp

Stable identifier: bcf9e895-4b1e-4f17-9eb4-4fea4a2d4c4b