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
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.
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
Loading local map…
Capacity evidence
Statements retain their dates, definitions and development scope. Do not add these rows together.
Excluded from capacity totals. As of announcement date; ultimate development capacity, not installed operating load. Later report states 162 MW facility load.
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.
Excluded from capacity totals. As of retrieval of undated facility page; operational status supported separately by s9. Does not establish occupied IT load.
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
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.
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
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
2022-11-08 · announcement
OS1 construction announced
ESR announced commencement of its first Cosmosquare data-centre phase.
Municipal disclosure identifies computer-room building at Suminoe-ku Nanko Kita 1-chome; five floors, August 2024 completion and B+ environmental assessment.
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.
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