Proprietary data
Every data center in Japan that we have verified: operator, location, status and capacity, each checked against its source.
By Amit Jain
Reviewed by Deepti Agrawal
Updated 10 Oct 2026
In short
As of 10 October 2026, DC Market Insights tracks 4 data centers in Japan run by 1 operators: 2 operational, 1 under construction and 1 planned. Stated operational capacity is 410 MW, with a further 20 MW under construction and 100 MW planned. AirTrunk holds the largest share of tracked operational capacity (100%).
MW = IT capacity where the source states it, otherwise total capacity. 4 of 4 facilities have a stated capacity; the others are counted as sites only.
Market snapshot
Source: DC Market Insights Data Center Tracker. MW as stated by each facility source.
OperationalUnder construction or planned
| Operator | Facilities | Operational MW | Pipeline MW | Share of operational MW |
|---|---|---|---|---|
| AirTrunk | 4 | 410 MW | 120 MW | 100% |
Under construction and planned facilities with a stated capacity, largest first. 20 MW under construction and 100 MW planned in total.
Countries in the same region, by tracked capacity. Coverage grows as each country is researched.
| Country | Facilities | Operators | Operational MW | Pipeline MW |
|---|---|---|---|---|
| India | 181 | 29 | 2,002 MW | 4,443 MW |
| Malaysia | 64 | 26 | 1,206 MW | 2,761 MW |
| Japan | 4 | 1 | 410 MW | 120 MW |
| Australia | 3 | 1 | 170 MW | 354 MW |
| Singapore | 48 | 19 | 288 MW | 235 MW |
| Kazakhstan | 29 | 9 | 30.7 MW | 302 MW |
| Bangladesh | 19 | 14 | 9 MW | 48.8 MW |
| Pakistan | 21 | 14 | 15.5 MW | 5 MW |
| Hong Kong | 1 | 1 | 20 MW | — |
| Nepal | 14 | 9 | 5 MW | 7.5 MW |
| Uzbekistan | 7 | 4 | — | 12 MW |
| Sri Lanka | 7 | 4 | 1.5 MW | — |
Our Deal Tracker lists 5 deals in Japan since January 2026, with $16.30B in disclosed value.
4 facilities match. Each is checked against its source; source links come with the Excel data.
| Facility | Location | Status | Capacity | Year | Source |
|---|---|---|---|---|---|
| TOK1AirTrunk | Inzai | Operational | 300 MW total | 2021 | Operator / official |
| TOK2AirTrunk | Tokyo | Operational | 110 MW total | 2024 | Operator / official |
| OSK2AirTrunk | Osaka | Planned | 100 MW total | — | Operator / official |
| OSK1AirTrunk | Osaka | Under construction | 20 MW total | — | Operator / official |
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Talk to an analystDC Market Insights tracks 4 data centers in Japan as of October 2026: 2 operational, 1 under construction and 1 planned, run by 1 operators. The count grows as we verify more sites.
Tracked operational capacity in Japan is 410 MW, with 20 MW under construction and 100 MW planned. These totals use the capacity each source states (IT load where given) and cover 4 of 4 tracked facilities.
By tracked operational capacity, the largest operators in Japan are AirTrunk (410 MW).
The largest clusters by tracked capacity are Tokyo (2 facilities) and Osaka (2 facilities). The map above shows every site.
We track 20 MW under construction and 100 MW planned. The largest projects are OSK2 by AirTrunk (100 MW) and OSK1 by AirTrunk (20 MW).
Every facility comes from a page we opened: the operator’s own website or announcement, a stock-exchange filing, a planning or government record, or a named trade publication. A second analyst re-opens the source and checks the name, location, status and capacity before the row is published. We do not copy other data center directories.
We show IT (critical) capacity when the source states it, otherwise the total or utility capacity the source gives, and say which in the facility’s note. When a source gives no capacity, the field stays empty. We never estimate it.
When the source gives an address or coordinates we use them. Otherwise the dot sits at the centre of the facility’s city (marked as approximate), using the GeoNames gazetteer.
The tracker is updated every week as new facilities are announced and existing ones change status. Each row shows the date it was last checked.
Yes. Each country with 50 or more facilities has a Capacity Sheet in Excel with every facility, its source link, the status history and summaries. Our analysts can also prepare an operator extract or a custom cut.
Our analysts prepare country and operator extracts in Excel, capacity pipelines and site-selection briefings.