Mitsui Fudosan, Kumagai Gumi and Getworks are developing Japan's first commercial underground data center using an existing tunnel in Kobe, Hyogo. The project will deploy containerized data center facilities to serve growing GPU and critical-data infrastructure demand, with operations planned to begin by the end of 2027.
GMO Internet has joined the Ishikari Data Center Consortium and decided to develop a new site in the Ishikari Bay New Port area of Hokkaido to expand computing resources for its GMO GPU Cloud. The company will work with data center, power, telecommunications and municipal partners to secure the electricity, communications infrastructure and land needed for an AI computing hub.
Fantasista's board decided to develop an AI data center on approximately 71,787 sqm of land it owns in Aoba-ku, Sendai, Miyagi, through consolidated subsidiary NC MAX WORLD. The planned facility has a total power capacity of approximately 200MW, with a Phase I project budget of approximately ¥400 billion, and the company is targeting development-permit acquisition during fiscal 2028. Fantasista states the project's content, scale, schedule and cost remain subject to change, or the project may not proceed, pending discussions with local authorities, utilities and other parties.
J-POWER has decided to develop and operate its first data center, the Kaminokuni Data Center project, in Kaminokuni, Hokkaido. The facility will use GPU-equipped servers, cooling systems and 40-foot containers to sell computing capacity for generative AI development and simulations, with service launch planned for summer 2027.
Mitsubishi Chemical will commercialize ultra-high-purity colloidal silica for polishing slurries used in advanced semiconductor manufacturing by installing new production equipment at its Kyushu Plant in Kitakyushu, Fukuoka. Commercial operations are scheduled to begin in October 2028, supporting semiconductor materials demand driven by generative AI and data centers.
NTT West will build a next-generation AI-ready data center in Fukuoka, one of two announced together with a second site, to meet rising demand for AI infrastructure and to strengthen connections with overseas networks. No investment amount, capacity or completion date was disclosed.
NTT West will build a next-generation AI-ready data center in Osaka, one of two announced together with a second site, to meet rising demand for AI infrastructure and to strengthen connections with overseas networks. No investment amount, capacity or completion date was disclosed.
AGS is expanding floor space at its Saitama Center data center in Saitama, Japan. The disclosure reports media coverage of the expansion but does not state the investment amount, added capacity, contractor, or schedule.
Tatsuta Electric Wire, a JX Advanced Metals group company, is investing at its Kyoto Factory in Fukuchiyama to expand production capacity for water leakage detection systems used in AI data centers. The project includes additional manufacturing equipment and optimization of the existing building layout and workflow, with full-scale operation scheduled to begin at the end of August 2026.
Flower Communications announced that Ishikari Renewable Energy Data Center No. 1 began service on August 1, 2026, following construction completed on March 27, 2026 and fit-out work. The green data center in Ishikari operates on 100% renewable energy and supports water and liquid cooling in part of its six data-center sections, with an IOWN All-Photonics Network connection to Tokyo.
MIRAIT ONE has installed a 20-foot water-cooled container data center at its Shinkiba building in Tokyo, equipped with Delta Electronics' Liquid-to-Air Coolant Distribution Unit (LTA CDU). The facility will validate high-performance GPU servers and IOWN-enabled next-generation AI infrastructure, with operations scheduled to begin from September 2026.
Mitsubishi Electric will establish MEHITS US, a new subsidiary in Mason, Ohio, in August 2026 to manufacture cooling systems for data centers. The company will invest approximately $30 million to refurbish and convert an existing automotive manufacturing facility, targeting production startup in April 2027 with planned annual capacity of approximately 6,000 units by 2030.
Daiichi Kogyo Seiyaku decided on capital investment to strengthen its supply system for low-dielectric resin materials used in high-end servers, amid surging demand driven by data center and high-speed communication infrastructure expansion. The investment, targeting domestic and overseas production sites, totals approximately ¥10 billion and is planned to begin operation from fiscal 2027 onward.
Getworks, in collaboration with Tohoku Electric Power, has completed construction of a new container-type data center called 'Miyagi AI Data Center' on idle land owned by Tohoku Electric Power in Shichigahama, Miyagi Prefecture. The facility will offer housing services for next-generation high-performance GPU servers starting July 31, 2026, supporting generative AI infrastructure demand across the Tohoku region.
JX Advanced Metals will invest about JPY 4 billion to expand processing capacity for sputtering targets used in advanced logic, HBM, and 3D-NAND chips at its South Korean subsidiary JX Korea. The investment introduces new processing equipment accumulated across the group's Japanese sites, roughly doubling the site's processing capacity versus FY2025 levels, with phased startup expected from FY2027 to meet booming AI data center-driven semiconductor demand.
Mitsui Fudosan announced plans to expand beyond logistics facilities into data centers and automated logistics, positioning itself as an 'industrial developer.' The company plans total investment of about ¥600bn across data center projects nationwide, with roughly ¥300bn already invested; new development is underway in the Kansai-Hokusetsu and Kanto-Tama areas, part of 7 facilities in progress nationwide, targeting completion of the full investment plan by FY2035.
Accrete signed agreements with Getworks and Dell Technologies to acquire a new container-type data center in Yuzawa, Niigata Prefecture, equipped with Dell water-cooled NVIDIA B300 GPU servers and quantum-resistant encryption from its subsidiary Forward Edge-AI Japan. The facility leverages secured power and cold climate/well water cooling advantages, with completion and handover expected September 30, 2026 and leasing to begin October 1, 2026.
Godo Kaisha Ishikari Saiene Data Center No.1, jointly invested by Tokyu Fudosan, Flower Communications, and Agility Asset Advisors, completed construction of a data center in Ishikari City, Hokkaido on March 27, 2026. The facility will run entirely on Ishikari's renewable energy and will begin partial data hall operations in August 2026, connected to Tokyo's Otemachi via NTT East's IOWN All-Photonics Network for low-latency, high-speed connectivity.
Kaishin Digital Infrastructure, a joint venture set up by Taiwan's CDIB Capital Group and Shin-Etsu Kagaku Sangyo, signed a location agreement with Satsumasendai City on 18 July 2026 to build an AI data center on the Circular Park Kyushu site, the former Sendai thermal power station. Planned investment is approximately ¥850 billion for a cumulative 350 MW of capacity, which the city describes as among the largest in Japan. The site will start with a demonstration phase and expand in stages. The city expects a further ¥2 trillion of AI server-related investment across the wider park. The company was incorporated on 20 January 2026; a five-party memorandum with Kagoshima Prefecture, Circular Park Kyushu and Kyushu Electric Power followed on 12 February 2026.
Data Section began moving NVIDIA B300 GPU servers into what it calls Japan's first dedicated AI data center, in Inzai, Chiba - relocated from an originally planned Osaka site to cut latency for customers. Built inside a data-center facility in Inzai, it is being brought online in stages between May and July 2026. The company has committed about ¥50.9bn to acquire the B300 server fleet for the cluster.
Environmental Friendly Holdings' subsidiary AI Tech Tomakomai signed a preferential negotiation MOU with Finnish AI cloud provider Verda Cloud Oy for a definitive colocation lease covering the full 10MW Phase I capacity of the Tomakomai AI data center in Hokkaido. The MOU includes a $5 million reservation deposit and marks the first concrete demand-side milestone for the project, which also plans a 50MW Phase II expansion via new 66kV substation infrastructure.
NHK Spring (Nippon Hatsujo) plans to invest approximately JPY 15 billion in a new production building at its Thai subsidiary NHK Spring (Thailand)'s Wellgrow plant in Chachoengsao to increase production capacity for HDD suspensions, a key component. The building is scheduled for completion in December 2027, and will raise the site's HDD suspension capacity by up to 1.6x; the company plans roughly JPY 35 billion in total investment across further phases to meet rising demand from AI-related data centers.
NTT Data Group, through NTT Global Data Centers, launched development of the 'Tokyo TKY12' data center campus in the Inzai-Shiroi area of Chiba - a roughly 250MW, six-building campus that will rank among Japan's largest. First-phase service is planned for 2030 onward, with a high-efficiency, expandable design built for growing cloud and AI demand.
Showing 1–23 of 23