Data center areas in Japan
79 published facilities and projects in Japan, with location, status, capacity types, dates and sources. Focused on AI and hyperscale infrastructure; not a census of all data centers.
Registry updated (distinct from content verification): 2026-11-11 02:40:08
Inzai (15)
AirTrunk TOK1 (Inzai)
Inzai, Chiba · Expanding · E1
40 MW（Planned maximum (incl. future)）
Status as of: 2025-02-10
Content verified: not recorded
Companies: AirTrunk
Sources: 日本経済新聞
Colt Inzai Data Centre 1
Inzai, Chiba · Operational · E3
8 MW（IT load）
Status as of: Date unknown
Content verified: not recorded
Companies: Colt DCS
Sources: Colt DCS
Colt Inzai Data Centre 2
Inzai, Chiba · Operational · E3
15 MW（IT load）
Status as of: Date unknown
Content verified: not recorded
Companies: Colt DCS
Sources: Colt DCS
Colt Inzai Data Centre 3
Inzai, Chiba · Operational · E3
27 MW（IT load）
Status as of: Date unknown
Content verified: not recorded
Companies: Colt DCS
Sources: Colt DCS
Colt Inzai Data Centre 4
Inzai, Chiba · Operational · E3
20 MW（IT load）
Status as of: 2025-02-26
Content verified: not recorded
Companies: Colt DCS
Sources: Colt DCSクラウド Watch
Google Inzai Data Center
Inzai, Chiba · Operational · E3
Capacity not recorded
Status as of: 2023-04
Content verified: not recorded
Companies: Google
Sources: ジェトロGoogle Japan Blog
Keppel Tokyo Data Centre 3
Inzai, Chiba · Operational · E3
Capacity not recorded
Status as of: 2025
Content verified: not recorded
Companies: Keppel DC REIT
Sources: Keppel Data CentresKeppel Ltd.
MC Digital Realty NRT10 Data Center
Inzai, Chiba · Operational · E3
39 MW（IT load）
Status as of: 2021-09
Content verified: not recorded
Companies: MCデジタル・リアルティ
Sources: ASCII.jpMCデジタル・リアルティ
MFIP Inzai (Mitsui Fudosan, formerly Inzai Technology Building)
Inzai, Chiba · Operational · E3
Capacity not recorded
Status as of: 2014-02
Content verified: not recorded
Companies: 三井不動産ロジスティクスパーク投資法人
Sources: 三井不動産ロジスティクスパーク投資法人三井不動産
STACK Infrastructure TKY01A Data Center
Inzai, Chiba · Operational · E3
18 MW（IT load）
Status as of: 2024-10
Content verified: not recorded
Companies: STACK Infrastructure
Sources: STACK Infrastructureクラウド Watch
STT Tokyo 1 (STT GDC Inzai)
Inzai, Chiba · Operational · E1
Capacity not recorded
Status as of: 2026-10-27
Content verified: not recorded
Companies: STT GDC
Sources: STT GDC Japan東洋経済オンライン
Equinix TY12x Data Center
Inzai, Chiba · Operational · E3
54 MW（IT load）
Status as of: 2021-03
Content verified: not recorded
Companies: Equinix Japan
Equinix TY13x Data Center
Inzai, Chiba · Operational · E3
36 MW（Planned maximum (incl. future)）
Status as of: 2023-06-29
Content verified: not recorded
Companies: Equinix Japan
Sources: クラウド Watchエクイニクス
Data Section Inzai AI Data Center
Inzai, Chiba · Operational · E3
Capacity not recorded
Status as of: 2026-10-23
Content verified: not recorded
Companies: Datasection Inc.
Sources: トレーダーズ・ウェブ（DZH）データセクション（TDnet開示）
Daiwa House DPDC Inzai Park
Inzai, Chiba · Announced · E1
Capacity not recorded
Status as of: 2025
Content verified: not recorded
Companies: Daiwa House Industry Co., Ltd.
Sources: 日経クロステック
Shiroi (2)
IIJ Shiroi Data Center Campus
Shiroi, Chiba · Operational · E3
Capacity not recorded
Status as of: 2019
Content verified: not recorded
Companies: インターネットイニシアティブ
Sources: インターネットイニシアティブ(IIJ)
NTT DATA Tokyo TKY12 (Inzai/Shiroi Campus)
Shiroi, Chiba · Announced · E3
250 MW（Planned maximum (incl. future)）
Status as of: Date unknown
Content verified: not recorded
Companies: NTT DATA Group Corporation
Sources: NTTデータグループ建設通信新聞Digital
Ishikari (3)
Sakura Internet Ishikari Data Center
Ishikari, Hokkaido · Expanding · E3
Capacity not recorded
Status as of: 2025-06-25
Content verified: not recorded
Companies: SAKURA internet Inc.
Sources: さくらインターネットIBEC建築環境・省エネルギー機構
KCCS Zero-Emission Data Center Ishikari
Ishikari, Hokkaido · Operational · E1
Capacity not recorded
Status as of: 2024-10-01
Content verified: not recorded
Companies: KYOCERA Communication Systems Co., Ltd.
Sources: MIRAIT ONE（未来図）
石狩再エネデータセンター第1号
Ishikari, Hokkaido · Operational · E3
15 MW（Utility supply capacity）
Status as of: 2026-10-15
Content verified: not recorded
Companies: 合同会社石狩再エネデータセンター第1号東急不動産株式会社株式会社Flower Communications
Sources: クラウド Watchブロードバンドタワー
Tomakomai (2)
Hokkaido Tomakomai AI Data Center
Tomakomai, Hokkaido · Under construction · E3
300 MW（Planned maximum (incl. future)）
Status as of: 2026-06-30
Content verified: not recorded
Companies: IDC Frontier Inc.SoftBank Corp.
Sources: 環境省 北海道環境局ソフトバンク
Tomakomai AI Factory (AI Tech Tomakomai / Kankyo Friendly HD)
Tomakomai, Hokkaido · Announced · E3
10 MW（Planned maximum (incl. future)）
Status as of: 2026-07-03
Content verified: not recorded
Companies: AI Tech Tomakomai Inc. (subsidiary of Kankyo Friendly Holdings)
Sources: 環境フレンドリーホールディングス財経新聞
Ibaraki, Osaka (3)
MC Digital Realty KIX10 Data Center
Ibaraki, Osaka · Operational · E3
7.6 MW（IT load）
Status as of: Date unknown
Content verified: not recorded
Companies: MCデジタル・リアルティ
Sources: MCデジタル・リアルティ
MCデジタル・リアルティ KIX15データセンター
Ibaraki, Osaka · Under construction · E3
24 MW（IT load）
Status as of: Date unknown
Content verified: not recorded
Companies: MCデジタル・リアルティ
Sources: MCデジタル・リアルティ
NTT DATA Osaka (Ibaraki) Data Center
Ibaraki, Osaka · Announced · E3
36 MW（IT load）
Status as of: 2026-07-16
Content verified: not recorded
Companies: NTT DATA Group Corporation
Sources: NTTデータグループ
Minoh (3)
MC Digital Realty KIX11 Data Center
Minoh, Osaka · Operational · E3
25 MW（IT load）
Status as of: 2019-06
Content verified: not recorded
Companies: MCデジタル・リアルティ
Sources: クラウド Watch鴻池組
Equinix OS2x Data Center
Minoh, Osaka · Operational · E3
10 MW（IT load）
Status as of: 2021-12-24
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス(PR TIMES)エクイニクス
Equinix OS4x Data Center
Minoh, Osaka · Operational · E3
14.4 MW（IT load）
Status as of: 2024-06-05
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクスData Center Café
Seika (2)
Keihanna OSK11 Data Center (NTT DATA Group)
Seika (Soraku), Kyoto · Operational · E3
30 MW（IT load）
Status as of: 2026-04
Content verified: not recorded
Companies: NTTグローバルデータセンター株式会社
Sources: NTTデータグループNTTデータ
Kansai Electric CyrusOne OSK1 Data Center
Seika (Soraku), Kyoto · Announced · E3
48 MW（IT load）
Status as of: 2024-09-12
Content verified: not recorded
Companies: 関西電力サイラスワン株式会社
Sources: 日本経済新聞関西電力・CyrusOne