Published specificationsOperation announced

Cosmosquare OS1 Data Centre

Suminoe Ward, Osaka City, Osaka Prefecture

CloudHQ / ESR joint venture (1 facilities)

Hyperscale facility in Nanko-Kita, Osaka City. The current official page states 19.2MW IT load and Ready for Service in May 2025.

Contact Official websiteChecked 2026-09-23

CapacityNot verified

Rack powerIT load 19.2MW

Cooling methodHigh-efficiency cooling (method undisclosed)

Published specifications

it capacity: 19.2MWOS1 standalone facility
facility load: 25MWOS1 standalone facility · Note in 2024 announcement states facility load
planned campus capacity: 130MWMulti-phase campus across OS1 to OS3 · Not a single-building value
ready for service: 2025-05OS1

Differences between published sources

Current property page states 19.2MW IT load; 2024 announcement states 25MW facility load. Both are stated side-by-side because capacity types differ, and only IT load was adopted for qualification.
The 2024 interim report includes phrasing that can be read as OS1 110MW, but it was not adopted as it is inconsistent with subsequent facility-specific official pages and news.

Notes

Joint development and operation by CloudHQ and ESR confirmed in 2025 official news.
Basis for medium-scale or larger adoption: Confirmed 19.2MW of IT load capacity on the current official property page, meeting the criteria.

Official inquiry page of ESR's Japan entity. Lists Japan contact email and phone number, but a dedicated data center quote form cannot be confirmed on the page, effectively starting via email/phone. No login required, no automatic price presentation. Not a CloudHQ-dedicated contact point, so the facility name must be clearly stated.