Japan data centers by company
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
1 facilities have no company link. Counts reflect registered relationships, not a company's full portfolio.
AI Tech Tomakomai Inc. (subsidiary of Kankyo Friendly Holdings) (1)
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
AirTrunk (1)
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
APL Group (Asia Pacific Land) (2)
APL Kitakyushu Data Center
Kitakyushu, Fukuoka · Announced · E1
120 MW（Planned maximum (incl. future)）
Status as of: 2026-10-15
Content verified: not recorded
Companies: APL Group (Asia Pacific Land)
APL Itoshima Data Center
Itoshima, Fukuoka · Announced · E1
300 MW（Utility supply capacity）
Status as of: 2024-02-05
Content verified: not recorded
Companies: APL Group (Asia Pacific Land)
Sources: 日本経済新聞
Colt DCS (4)
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
Digital Edge (7)
Digital Edge OSA2 Data Center
Kobe, Hyogo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Digital Edge OSA1 Data Center
Osaka, Osaka · Operational · E3
14.4 MW（Type unknown）
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Digital Edge TYO1 Data Center
Bunkyo, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Digital Edge TYO2 Data Center
Chuo, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Digital Edge TYO3 Data Center
Shinjuku, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Digital Edge TYO7 Data Center
Chuo, Tokyo · Operational · E3
4.8 MW（Type unknown）
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Digital Edge TYO4/5/6 Yokohama Campus
Yokohama, Kanagawa · Operational · E3
18.5 MW（Type unknown）
Status as of: Date unknown
Content verified: not recorded
Companies: Digital Edge
Sources: Digital Edge
Google (1)
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
IDC Frontier Inc. (1)
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
Kyushu Railway Company (1)
JR Kyushu Kurume Data Center
Kurume, Fukuoka · Announced · E1
Capacity not recorded
Status as of: 2026-07-16
Content verified: not recorded
Companies: Kyushu Railway Company
Sources: 日本経済新聞
KDDI (1)
KDDI Osaka Sakai Data Center
Sakai, Osaka · Operational · E3
Capacity not recorded
Status as of: 2026-10-27
Content verified: not recorded
Companies: KDDI
Sources: クラウド WatchKDDI
Keppel DC REIT (1)
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デジタル・リアルティ (4)
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
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 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
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グローバルデータセンター株式会社 (1)
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
NTT DATA Group Corporation (2)
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
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
RHAELM Holdings Ltd. (1)
JERA Chiba Thermal Power Station AI Data Center Project
Chiba, Chiba · Announced · E3
400 MW（Planned maximum (incl. future)）
Status as of: 2026-10-01
Content verified: 2026-10-08
Companies: RHAELM Holdings Ltd.JERA Co., Inc.
Sources: 株式会社JERA
STACK Infrastructure (1)
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 GDC (1)
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
インターネットイニシアティブ (1)
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)
Equinix Japan (17)
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
Equinix OS1 Data Center
Osaka, Osaka · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix OS3 Data Center
Osaka, Osaka · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
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
Equinix TY1 Data Center
Ota, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY10 Data Center
Bunkyo, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY11 Data Center
Koto, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY15 Data Center
Minato, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY2 Data Center
Shinagawa, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY3 Data Center
Koto, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY4 Data Center
Chiyoda, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY5 Data Center
Koto, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY6 Data Center
Shinagawa, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY7 Data Center
Shinagawa, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
Equinix TY8 Data Center
Shinagawa, Tokyo · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: Equinix Japan
Sources: エクイニクス
グッドマンジャパングループ (1)
相模原データセンターキャンパス計画（グッドマン・麻溝台/新磯野北部地区）
Sagamihara, Kanagawa · Announced · E3
Capacity not recorded
Status as of: 2026-05-28
Content verified: not recorded
Companies: グッドマンジャパングループ
Sources: 相模原市グッドマングループ（共同通信PRワイヤー配信）
グッドマンジャパンつくば特定目的会社 (1)
グッドマンつくばデータセンターキャンパス
Tsukuba, Ibaraki · Announced · E3
Capacity not recorded
Status as of: 2026-10-29
Content verified: not recorded
Companies: グッドマンジャパンつくば特定目的会社グッドマンジャパン株式会社
グッドマンジャパン株式会社 (1)
グッドマンつくばデータセンターキャンパス
Tsukuba, Ibaraki · Announced · E3
Capacity not recorded
Status as of: 2026-10-29
Content verified: not recorded
Companies: グッドマンジャパンつくば特定目的会社グッドマンジャパン株式会社
SAKURA internet Inc. (1)
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
SoftBank Corp. (4)
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
SoftBank Sakai AI Data Center
Sakai, Osaka · Announced · E3
150 MW（Utility supply capacity）
Status as of: 2026-07-16
Content verified: not recorded
Companies: SoftBank Corp.
Sources: ソフトバンク
SoftBank Tokyo Fuchu Data Center
Fuchu, Tokyo · Operational · E3
50 MW（Utility supply capacity）
Status as of: 2020-12
Content verified: not recorded
Companies: SoftBank Corp.
Fukuoka Kitakyushu Data Center (Asian Frontier)
Kitakyushu (Yahatahigashi), Fukuoka · Operational · E3
Capacity not recorded
Status as of: 2008
Content verified: not recorded
Companies: SoftBank Corp.
Sources: IDCフロンティアIDCフロンティア（現ソフトバンク）
Daiki Axis Sustainable Power CO.,LTD (2)
Northern Chiba Green Data Center (DASP / detailed location undisclosed)
Chiba · Operational · E3
Capacity not recorded
Status as of: 2026-03
Content verified: not recorded
Companies: Daiki Axis Sustainable Power CO.,LTDDaiki Axis Sustainable Power CO.,LTDMIRAIT ONE CorporationMorgenrot
Sources: ダイキアクシス（東証4245・適時開示形式リリースPDF）モルゲンロット（DASP・ミライト・ワン3社共同リリース）
Nanyo Green Data Center (DASP / detailed location undisclosed)
Ehime · Operational · E3
Capacity not recorded
Status as of: 2026-03
Content verified: not recorded
Companies: Daiki Axis Sustainable Power CO.,LTDDaiki Axis Sustainable Power CO.,LTDMIRAIT ONE CorporationMorgenrot
Sources: ダイキアクシス（東証4245・適時開示形式リリースPDF）モルゲンロット（DASP・ミライト・ワン3社共同リリース）
Datasection Inc. (1)
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）
デジタルダイナミック株式会社 (1)
Iriki Industrial Park AI Data Center (Digital Dynamic)
Satsumasendai, Kagoshima · Announced · E3
19 MW（Planned maximum (incl. future)）
Status as of: 2025-11-25
Content verified: not recorded
Companies: デジタルダイナミック株式会社
White Data Center Inc. (1)
White Data Center (Bibai, snow cooling)
Bibai, Hokkaido · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: White Data Center Inc.
Sources: ホワイトデータセンター美唄市
MIRAIT ONE Corporation (2)
Northern Chiba Green Data Center (DASP / detailed location undisclosed)
Chiba · Operational · E3
Capacity not recorded
Status as of: 2026-03
Content verified: not recorded
Companies: Daiki Axis Sustainable Power CO.,LTDDaiki Axis Sustainable Power CO.,LTDMIRAIT ONE CorporationMorgenrot
Sources: ダイキアクシス（東証4245・適時開示形式リリースPDF）モルゲンロット（DASP・ミライト・ワン3社共同リリース）
Nanyo Green Data Center (DASP / detailed location undisclosed)
Ehime · Operational · E3
Capacity not recorded
Status as of: 2026-03
Content verified: not recorded
Companies: Daiki Axis Sustainable Power CO.,LTDDaiki Axis Sustainable Power CO.,LTDMIRAIT ONE CorporationMorgenrot
Sources: ダイキアクシス（東証4245・適時開示形式リリースPDF）モルゲンロット（DASP・ミライト・ワン3社共同リリース）
Morgenrot (2)
Northern Chiba Green Data Center (DASP / detailed location undisclosed)
Chiba · Operational · E3
Capacity not recorded
Status as of: 2026-03
Content verified: not recorded
Companies: Daiki Axis Sustainable Power CO.,LTDDaiki Axis Sustainable Power CO.,LTDMIRAIT ONE CorporationMorgenrot
Sources: ダイキアクシス（東証4245・適時開示形式リリースPDF）モルゲンロット（DASP・ミライト・ワン3社共同リリース）
Nanyo Green Data Center (DASP / detailed location undisclosed)
Ehime · Operational · E3
Capacity not recorded
Status as of: 2026-03
Content verified: not recorded
Companies: Daiki Axis Sustainable Power CO.,LTDDaiki Axis Sustainable Power CO.,LTDMIRAIT ONE CorporationMorgenrot
Sources: ダイキアクシス（東証4245・適時開示形式リリースPDF）モルゲンロット（DASP・ミライト・ワン3社共同リリース）
Kaishin Digital Infrastructure Inc. (1)
Satsumasendai AI Data Center
Satsumasendai, Kagoshima · Announced · E3
Capacity not recorded
Status as of: 2026-07-18
Content verified: not recorded
Companies: Kaishin Digital Infrastructure Inc.
株式会社DayOne Data Centers Japan (1)
DayOne 伊万里データセンター計画
伊万里市, Saga · Announced · E3
Capacity not recorded
Status as of: 2026-10-02
Content verified: not recorded
Companies: 株式会社DayOne Data Centers Japan
Sources: 伊万里市
株式会社fantasista (1)
fantasista 仙台AIデータセンター計画
仙台市青葉区, Miyagi · Announced · E3
200 MW（Utility supply capacity）
Status as of: 2026-09-11
Content verified: not recorded
Companies: 株式会社fantasista
Sources: クラウド Watch株式会社fantasista（TDnet開示）
株式会社Flower Communications (1)
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
JERA Co., Inc. (1)
JERA Chiba Thermal Power Station AI Data Center Project
Chiba, Chiba · Announced · E3
400 MW（Planned maximum (incl. future)）
Status as of: 2026-10-01
Content verified: 2026-10-08
Companies: RHAELM Holdings Ltd.JERA Co., Inc.
Sources: 株式会社JERA
株式会社ゲットワークス (3)
Kobe Underground Tunnel Data Center Project
Kobe, Hyogo · Announced · E3
20 MW（Planned maximum (incl. future)）
Status as of: 2026-10-06
Content verified: 2026-10-08
Companies: Mitsui Fudosan Co., Ltd.株式会社ゲットワークス株式会社熊谷組
Sources: 三井不動産株式会社・株式会社熊谷組・株式会社ゲットワークス
宮城AIデータセンター（東北電力・七ヶ浜）
宮城郡七ヶ浜町, Miyagi · Operational · E3
Capacity not recorded
Status as of: 2026-07-31
Content verified: not recorded
Companies: 東北電力株式会社株式会社ゲットワークス
Sources: クラウド Watch（インプレス）東北電力
鹿児島出水データセンター（ゲットワークス）
出水市, Kagoshima · Operational · E3
Capacity not recorded
Status as of: 2026-08-01
Content verified: not recorded
Companies: 株式会社ゲットワークス
株式会社ハイレゾ (1)
綾川町データセンター（ハイレゾ・旧綾上中学校）
綾歌郡綾川町, Kagawa · Operational · E3
Capacity not recorded
Status as of: 2026-03-03
Content verified: not recorded
Companies: 株式会社ハイレゾ
株式会社ユーラスエナジーホールディングス (1)
宗谷グリーンデータセンターⅠ（稚内・風力発電直結）
稚内市, Hokkaido · Under construction · E3
Capacity not recorded
Status as of: 2026-07-21
Content verified: not recorded
Companies: 株式会社ユーラスエナジーホールディングス豊田通商株式会社
株式会社熊谷組 (1)
Kobe Underground Tunnel Data Center Project
Kobe, Hyogo · Announced · E3
20 MW（Planned maximum (incl. future)）
Status as of: 2026-10-06
Content verified: 2026-10-08
Companies: Mitsui Fudosan Co., Ltd.株式会社ゲットワークス株式会社熊谷組
Sources: 三井不動産株式会社・株式会社熊谷組・株式会社ゲットワークス
関西電力サイラスワン株式会社 (1)
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
KYOCERA Communication Systems Co., Ltd. (1)
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）
合同会社石狩再エネデータセンター第1号 (1)
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
Mitsui Fudosan Co., Ltd. (2)
Kobe Underground Tunnel Data Center Project
Kobe, Hyogo · Announced · E3
20 MW（Planned maximum (incl. future)）
Status as of: 2026-10-06
Content verified: 2026-10-08
Companies: Mitsui Fudosan Co., Ltd.株式会社ゲットワークス株式会社熊谷組
Sources: 三井不動産株式会社・株式会社熊谷組・株式会社ゲットワークス
Mitsui Fudosan Hino DC Project
Hino, Tokyo · Pre-consultation · E3
Capacity not recorded
Status as of: 2026-10-01
Content verified: not recorded
Companies: Mitsui Fudosan Co., Ltd.
Sources: 日刊ゲンダイDIGITALしんぶん赤旗
三井不動産ロジスティクスパーク投資法人 (1)
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
National Institute of Advanced Industrial Science and Technology (AIST) (1)
AIST AI Data Center Building (ABCI, Kashiwa)
Kashiwa, Chiba · Operational · E3
Capacity not recorded
Status as of: Date unknown
Content verified: not recorded
Companies: National Institute of Advanced Industrial Science and Technology (AIST)
Sources: 産業技術総合研究所（ABCI公式）
西日本電信電話株式会社（NTT西日本） (1)
NTT西日本 大阪南データセンター
大阪市中央区, Osaka · Announced · E3
Capacity not recorded
Status as of: 2026-06-23
Content verified: not recorded
Companies: 西日本電信電話株式会社（NTT西日本）
Sources: NTT西日本クラウド Watch
Daiwa House Industry Co., Ltd. (1)
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
電源開発株式会社 (1)
J-POWER 上ノ国データセンター（仮称）
檜山郡上ノ国町, Hokkaido · Announced · E3
Capacity not recorded
Status as of: 2026-08-17
Content verified: not recorded
Companies: 電源開発株式会社
Sources: 電源開発株式会社
東急不動産株式会社 (1)
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
東北電力株式会社 (1)
宮城AIデータセンター（東北電力・七ヶ浜）
宮城郡七ヶ浜町, Miyagi · Operational · E3
Capacity not recorded
Status as of: 2026-07-31
Content verified: not recorded
Companies: 東北電力株式会社株式会社ゲットワークス
Sources: クラウド Watch（インプレス）東北電力
日本GLP (1)
GLP Akishima Project (8 Data Center Buildings)
Akishima, Tokyo · Pre-consultation · E3
Capacity not recorded
Status as of: 2026-10-20
Content verified: not recorded
Companies: 日本GLP
日本電気株式会社 (1)
NEC Kanagawa Data Center
相模原市中央区, Kanagawa · Operational · E3
Capacity not recorded
Status as of: 2023-10
Content verified: not recorded
Companies: 日本電気株式会社
Sources: NEC
豊田通商株式会社 (1)
宗谷グリーンデータセンターⅠ（稚内・風力発電直結）
稚内市, Hokkaido · Under construction · E3
Capacity not recorded
Status as of: 2026-07-21
Content verified: not recorded
Companies: 株式会社ユーラスエナジーホールディングス豊田通商株式会社