Most of what gets called ecosystem building in quantum computing happens on paper. National funding programs, consortium agreements, shared testbeds, roadmaps that align a dozen organizations around a common set of dates. All of it matters. None of it puts anyone in the same room.

In January 2027, Deloitte Tohmatsu and Mitsubishi Estate plan to open something more literal. Tokyo Quantum Gateway (a provisional name), or TQG, is a shared office dedicated to quantum companies, researchers, and business professionals, on the 8th floor of the Shin-Tokyo Building in Marunouchi, inside Deloitte Tohmatsu Innovation Park and a five-minute walk from Tokyo Station. It will be operated jointly by Deloitte Tohmatsu LLC and Mitsubishi Estate, as described in Deloitte Tohmatsu's announcement. QuEra Japan plans to participate in TQG and use its coworking space as a workspace.

Hiroyuki Tezuka, who leads Deloitte Japan's technical research team, described the project during a recent joint session with QuEra. It is worth being precise about who is doing what here: TQG is a Deloitte-led initiative developed with Mitsubishi Estate. QuEra plans to participate as an ecosystem participant, not a co-developer. That distinction is part of what makes the project interesting, because it means the hub belongs to the ecosystem rather than to any one hardware vendor in it.

This post draws on Tezuka's presentation in the Deloitte session at the QuEra Quantum Alliance 2026 Annual Meeting (QQA 2026).

Three Angles on Quantum in Japan

Deloitte is a global professional services firm with quantum specialists across several regions, and Tezuka noted that the Japan and US teams both run strong research groups. In Japan, the work is organized around three angles rather than one.

The first is technical research, the kind of algorithm and resource-estimation work that shows up in preprints and conference sessions. The second is business consulting, helping organizations figure out where quantum methods might eventually matter to them and what would have to be true first. The third is ecosystem building.

That third angle is the one that tends to get described in the vaguest terms across the industry, and it is the one TQG makes concrete. A consulting firm building a shared office is an unusual move. It only makes sense if you believe that the binding constraint on a national quantum market is not capital or hardware access, but the number of unplanned conversations happening between the people in it.

A Shared Office, Five Minutes From Tokyo Station

The basic function of TQG is straightforward. It is a shared workspace, in central Tokyo, restricted to people working on quantum.

The location is deliberate. Tokyo Station is the point where the Shinkansen network, the subway, and the commuter lines converge, which makes a five-minute walk from it roughly the most accessible address in the country for a visitor arriving from Osaka, from Tsukuba, or from an international flight. For an ecosystem whose participants are spread across universities, national institutes, corporate R&D centers, and a handful of startups, proximity to the transit hub does more work than square footage does.

"The goal of this project is not just to provide office space, but to create a place where people in the quantum ecosystem can meet physically, regularly, and find cooperation," said Hiroyuki Tezuka, who leads the technical research team at Deloitte Japan.

The name reflects the intent. A gateway is a point of entry: for researchers into business, for companies into the ecosystem, and for overseas organizations into the Japanese market.

Why Researchers Sit at the Center

The list of stakeholders Deloitte wants in the building is broad: quantum researchers, startups, user companies evaluating the technology, vendor companies building it, quantum-focused venture capital, government, and global research hubs.

What is notable is the ordering. Deloitte's framing puts researchers deliberately at the center of the ecosystem, with everyone else arranged around them, rather than treating research as one input among many into a commercial pipeline.

"We believe that researchers need to be the center of the quantum ecosystem," Tezuka said, describing TQG as a place where researchers can connect with business, with academia, and with overseas companies entering the Japanese market.

For a hardware company, this is a congenial premise. QuEra's own position rests on peer-reviewed work developed with academic collaborators, and its largest deployment in Japan is an institutional one: Gemini, QuEra's gate-model neutral-atom system, is installed alongside the ABCI-Q classical supercomputer at AIST. The customers who evaluate that kind of system are rarely converted by a sales deck. They are converted by a researcher they already trust telling them the results hold up.

Resident, Visitor, or Host

TQG is designed to be entered at more than one level of commitment.

Members can use the coworking space, which QuEra Japan also plans to use as a workspace. Once registered, organizations can use the shared space free of charge. They can also host their own activities in it, including technical sessions and workshops, which turns the hub from a place people work into a place where things regularly happen.

For everyone not ready to commit to an address in central Tokyo, the space can be used more casually as a visitor. That tiering is the part most likely to determine whether TQG works. A shared office full of permanent tenants who already know each other is a coworking space. One with steady visitor traffic and a calendar of member-run events is closer to what the industry keeps saying it wants when it talks about ecosystems.

A Landing Point for Companies Entering Japan

Tezuka closed his portion of the session with a simple message, aimed at the foreign companies in the room. Deloitte supports quantum business development from a number of directions, and one of them is helping organizations enter or expand in the Japanese market specifically.

That offer and the hub reinforce each other. Market entry in Japan is not primarily a legal exercise. It is a matter of introductions, of understanding which institutions move first and which follow, and of being physically present often enough that people remember you. A dedicated building near Tokyo Station where the relevant institutions already circulate is a reasonable answer to that problem, and a considerably cheaper one for a new entrant than standing up an office and a network from scratch.

Why the Room Matters

QuEra operates globally from Boston, New Mexico, Tokyo, and the United Kingdom, and Japan has been central to its deployment strategy rather than peripheral to it. Work from TQG's coworking space and engaging directly with its ecosystem is a straightforward extension of that.

The broader point is about what kind of infrastructure the next phase of this industry needs. Fault-tolerant systems are arriving on a published timeline, and the organizations best positioned when they do will be the ones that spent the intervening years building the algorithms, the internal expertise, and the working relationships. The first two get most of the attention. The third is harder to fund, harder to measure, and in practice depends on people being in the same place often enough to start something together.

Tokyo Quantum Gateway is a bet that this is worth a building. If you are coming to Tokyo, it is worth knowing where it is.