NTT東日本 小曽木電話交換局
Tokyo, Japan
Source: OpenStreetMap
NTT東日本 小曽木電話交換局 is a mapped data center in Tokyo, Japan, operated by NTT Global Data Centers. DataCentersExposed has documented a 3,050 sq ft footprint and 1 environmental-permit record at this site. It runs on Japan's grid, which was 67% fossil-fuelled at 477 gCO₂e/kWh in 2025 (Ember).
Reporting by Eric Keller · Updated Jun 14, 2026
Most sites are mapped — located but awaiting a second source. How we verify
Dot size = disclosed capacity (MW). Smallest = undisclosed, not small.
Overview
source: linkNTT東日本 小曽木電話交換局 is a mapped data center in Japan, run by NTT Global Data Centers. Available records describe it as an NTT data center with a reported footprint of 3,050 square feet. No ultimate parent above the operator is disclosed in the available records.
Operator chain
- Ultimate parentNTT Global Data Centers
- Files asNTT Global Data Centers
- This facilityNTT東日本 小曽木電話交換局
The grid behind this site
source: Ember · EurostatNational grid context, not this facility's own metering. Full country picture: Japan data centers.
In the news
source: Google News (local + English)- NTTグローバルデータセンター、米事業資金10億ドル調達を検討－関係者（Bloomberg）Yahoo!ニュース· Jun 11, 2026
- NTTデータG、世界仕様のデータセンター相次ぎ竣工 大手の需要狙う日本経済新聞· May 21, 2026
- 【完全解説】規模も内容も凄い…NTTデータ「次世代AIデータセンター戦略」大解剖 連載：デジタル産業構造論ビジネス+IT· May 20, 2026
- 東京センチュリー＜8439＞、子会社の米NTT Global Data Centersの持分30％をJICTに譲渡して持分法適用関連会社にｄメニューニュース· Jan 20, 2026
- NTT、某ハイパースケーラーと130MWの容量リース契約を締結Data Center Cafe· Dec 8, 2025
- KKRがST Telemediaの買収を検討 ～評価額50億ドルData Center Cafe· Jul 28, 2025
Environmental permits
source: Permit register- NTT GLOBAL DATA CENTERS EMEA UK LTDEPR/BP3800PZEPR permit · holder "NTT GLOBAL DATA CENTERS EMEA UK LTD" · Dacorum · Combustion; Any Fuel =>50MW - 1.1 A(1) a) · within ~2 km of the mapped site