1. Digital Realty Japan plan adds $10 billion
Digital Realty Trust (NYSE: DLR) plans to invest an additional $10 billion in Japanese data centers over the next ten years, an expansion intended to nearly quadruple its capacity in the country. The Digital Realty Japan program, disclosed in mid-November 2026, is the company's largest commitment to the Asian market so far and centers on the Tokyo and Osaka regions.
The spending reflects a long-range bet that demand for computing power, and for artificial intelligence workloads in particular, will keep climbing well into the next decade. Rather than a single project, the commitment covers a pipeline of facilities that will be built and brought online in stages.
Digital Realty is one of the world's largest owners of data centers, leasing space, power and connectivity to cloud providers, large technology companies and enterprises. Its Japan push places the country at the heart of its Asia-Pacific growth strategy.
2. The MC Digital Realty joint venture
The money will flow through MC Digital Realty, the 50/50 joint venture Digital Realty formed with Mitsubishi Corporation in 2017. The partnership pairs Digital Realty's experience in designing and operating data centers with Mitsubishi's deep presence in the Japanese market, from real estate to industrial relationships.
Today the venture operates eight sites in Japan with about 170 megawatts of live IT capacity. IT capacity refers to the amount of power available to run the servers and networking equipment inside a facility, and it has become the industry's preferred yardstick for data center size. Floor space matters less than the electricity a building can deliver to its computing hardware.
Nearly quadrupling that base would take the joint venture's footprint far beyond its current scale and make Digital Realty and Mitsubishi among the most significant suppliers of computing infrastructure in Japan.
3. KIX15 leads the Osaka expansion
The headline project in the plan is KIX15, a new facility near Osaka. Construction began on October 7, 2026, and the building is designed to deliver 24 megawatts of IT capacity. Operations are scheduled to start in the fourth quarter of 2028.
KIX15 is being engineered for high-density AI infrastructure. It will support a hybrid of air cooling and liquid cooling, an approach increasingly needed as modern AI chips generate far more heat than the servers data centers were originally designed around. The facility is aimed at hyperscalers and cloud service providers, the largest buyers of data center capacity.
Once KIX15 is complete, the MC Digital Realty portfolio is expected to grow to 10 facilities with roughly 220 megawatts of total IT capacity. Several other projects in the Tokyo and Osaka regions are already in progress as part of the broader expansion.
4. NRT14 and the DGX-Ready standard
The new spending builds on NRT14, a facility in the Tokyo area that opened in April 2026. NRT14 was among the first data centers in Japan to be certified as NVIDIA DGX-Ready, a designation the chipmaker gives to sites capable of hosting its most powerful AI computing systems.
NRT14 supports power densities of up to 150 kilowatts per rack. To put that in perspective, conventional enterprise server racks have historically drawn a small fraction of that amount. The ability to feed and cool racks at that level is what separates facilities built for large-scale AI training and inference from older general-purpose data centers.
Digital Realty has paired its high-performance buildout with renewable energy initiatives, an increasingly important consideration as AI facilities consume large amounts of electricity and their customers face their own sustainability targets.
5. How AI is reshaping data center design
AI is reshaping data center design because the chips used to train and run large models consume and shed far more energy than traditional servers. A building planned around modest rack densities cannot simply be filled with AI hardware; its electrical systems, cooling plant and even floor loading may need to be rethought.
Air cooling, which moves chilled air through server aisles, struggles once racks reach very high power levels. Liquid cooling addresses that limit by carrying heat away more directly, either through cold plates attached to processors or through other systems that bring coolant close to the hardware. Hybrid designs like the one planned for KIX15 allow a facility to serve both conventional equipment and the most demanding AI clusters under one roof.
Certifications such as NVIDIA's DGX-Ready program give customers a shortcut when choosing a site. Rather than verifying every technical detail themselves, they can rely on the designation as evidence that a facility meets the power, cooling and connectivity requirements of a particular class of AI systems.
These engineering demands help explain why purpose-built AI capacity commands attention from the largest technology companies. Retrofitting older buildings is often slow and expensive, so new facilities designed for high density from the outset are in strong demand.
6. Who the new capacity is built for
The primary customers for projects like KIX15 are hyperscalers and cloud service providers. Hyperscalers are the handful of companies that operate computing platforms at enormous scale, renting processing power and storage to millions of businesses and developers. Their need for capacity often outstrips what they can build themselves, which is why they lease large blocks of space from specialist operators.
Cloud providers serving Japanese customers also face practical reasons to keep infrastructure inside the country, including latency for local users and the preferences of businesses that want their data held domestically. Large, modern sites in Tokyo and Osaka are well placed to meet those needs, and long-term leases from such tenants provide the steady income that underpins a ten-year investment program.
7. Why is Digital Realty investing in Japan?
Digital Realty is investing in Japan because it expects demand for AI-related computing in the country to keep growing for years. Japan sits at the center of the company's Asia-Pacific strategy, and Tokyo and Osaka are the nation's two dominant data center hubs, where cloud providers and large enterprises concentrate their infrastructure.
The commitment arrives at a moment when appetite for AI computing remains strong, even as enthusiasm for AI-related investment has cooled in some wider markets. By committing capital over a full decade, Digital Realty is signaling that it views the current wave of AI infrastructure spending as a durable trend rather than a short-lived spike.
Tokyo and Osaka offer complementary strengths. Tokyo is the country's largest commercial and financial center, while Osaka anchors western Japan and provides geographic diversity. Operators and their customers value having capacity in both metros so that workloads can be spread across regions and protected against local disruptions.
8. A decade-long timeline for long-lead projects
Data centers take years to plan and build. KIX15 alone will need roughly two years to go from groundbreaking to opening, and that timeline does not include the land acquisition, power arrangements and permitting that precede construction.
Spreading the $10 billion over ten years reflects those realities. It allows Digital Realty to line up sites and power connections in advance while retaining the flexibility to accelerate or slow the pace of development as customer demand evolves. A ten-year horizon also signals confidence that demand for high-density computing will persist into the 2030s.
The phased structure reduces the risk of overbuilding. Capacity can be added as leases are signed rather than all at once, a discipline that matters in a sector where the cost of an idle facility is substantial.
9. What the plan means for Digital Realty and Japan
For Digital Realty, the commitment would establish the company as one of Japan's largest data center operators. Growing from about 170 megawatts to nearly four times that level would give it a much larger share of a market that global cloud and AI companies are competing to serve.
For Japan, the plan adds to a growing base of AI-capable infrastructure in its two largest metropolitan regions. Domestic availability of high-density computing is increasingly viewed as strategic, since companies developing and deploying AI models need facilities that can host the latest chips close to their users and data.
The expansion also deepens the partnership with Mitsubishi Corporation, which shares equally in the joint venture. That structure spreads the capital burden between the two companies and combines global operating know-how with local market access.
Data center capacity has become a shared concern for the AI and digital asset industries. Both rely on large amounts of reliable power and advanced cooling, and both compete for the same scarce resource: sites with grid connections capable of supporting heavy computing loads.
Investors tracking the AI infrastructure trade watch announcements like this one as signals of how much capital is still flowing into physical computing capacity. A multi-year, multi-billion-dollar commitment from an established operator suggests that, at least in Japan, the buildout is expected to continue despite more cautious sentiment toward AI spending elsewhere.
Taken together, the expansion is a reminder that the competition in artificial intelligence is not only about software and chips. It is also about concrete, steel, power lines and cooling systems, and the companies able to deliver those at scale occupy an increasingly important position in the technology supply chain.
10. What comes next for MC Digital Realty
Two near-term markers will show how the plan is progressing. The first is the scheduled opening of KIX15 in the fourth quarter of 2028, which will lift the joint venture to 10 facilities and roughly 220 megawatts of capacity. The second is how quickly customers lease the high-density capacity at NRT14, which will indicate how strong demand for top-tier AI space actually is.
Beyond those milestones, the remaining projects in the Tokyo and Osaka pipeline will determine whether Digital Realty reaches its goal of nearly quadrupling its Japanese capacity over the coming decade.