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CARTIS

SoftBank Sakai AI Data Center

Sakai, Osaka, JapanStatus under review
Evidence
Planned / design
400 MW
Updated
Oct 28, 2026

SoftBank's current official infrastructure KPI, checked October 28, 2026, targets Sakai operations in FY2027 (April 2027–March 2028), superseding the earlier reported 2026 forecast. This is a fiscal-year target, not a promised calendar-year opening date. The KPI's estimated 140 MW receiving-power requirement is not IT load and is distinct from the historical 150 MW site-power plan. SoftBank Sakai AI Data Center — Conversion of acquired land and buildings within Sharp's former Sakai LCD plant; OpenAI site role not established by primary evidence. SoftBank Sakai AI Data Center is in Sakai, Osaka, 27, JP and is a data center campus with development status.

Capacity

Power capacity

Planned / design or future potential

150 MW

Source

Future power capacity

Planned / design or future potential

400 MW

Source

Operating IT capacity: Not established in published records

A missing figure does not mean zero. Planned, utility and generation figures are not operating IT capacity.

Development

Sharp–SoftBank MOU and reuse designAnnounced or preconstruction

Original 2024 plan and 2025 operations target.

Acquisition and AI data-center conversionAnnounced or preconstruction

Land and buildings were acquired in March 2025; commissioning has not been publicly announced.

Future power expansionPlanned

Over-400-MW future site power potential.

Milestones (4)
SoftBank and Sharp announced Sakai reuse MOU

Jun 7, 2024 · Recorded actual event

Completed · Customer commitment

Source not linked
Original target to start conversion around autumn 2024

Sep 2024 · Event timing type not established

Status not stated · Construction started

Source not linked
SoftBank acquired Sakai land and buildings for about JPY100 billion

Mar 2025 · Recorded actual event

Completed · Land acquired

Source not linked
Reported 2026 operations target

2026 · Forecast / planned record

Forecast · Event type not stated

Source not linked

Participants

SoftBank Corp.

Developer · Operator

Sources by role
Developer (1)
Developer / Operator (1)

Capital & incentives

Capital claims and financing records may overlap. Their amounts are not added together.

Capital claims

Acquisition consideration

Source report

100 JPY billion

Source

Financing records

Land and building acquisition

¥100,000,000,000

Mar 1, 2025

SoftBank purchase of relevant Sakai land/buildings; not construction financing or total project cost.

Parties & sources

Sharp Corporation (Other) · SoftBank Corp. (Other)

Sources (2)

Site & development

Site area

Reported rounded

440,000 square metres

Source

Additional project facts

Inherited infrastructure

Source report

Land, buildings, electric power supply facilities and cooling systems

Source

Infrastructure & permits

Technical details (2)
Electric grid

Planned or represented

150 MW

Over-150-MW site power target using inherited Sharp infrastructure; not IT load.

Cooling system

Planned or represented

Reuse of Sharp cooling infrastructure; current configuration not publicly disclosed.

Public-source research. Plans may change. See Evidence for sources and qualifications.