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Japan’s “massive @Tokyo data center” is most plausibly AT TOKYO’s Chuo Center (CC1). AT TOKYO describes CC1 as one of Japan’s largest data center buildings, based on its total building floor area—not a published ranking by power capacity, server-room area, rack count or IT load.
What facility does “@Tokyo data center” refer to?
The name points to Chuo Center (CC1), operated by AT TOKYO Corporation. AT TOKYO’s official data-center information page presents CC1 as a flagship facility in its Japanese network.
AT TOKYO is both a data-center colocation operator and a telecommunications carrier. Its corporate profile lists headquarters in Toyosu, Koto-ku, Tokyo, and names SECOM Co., Ltd., TEPCO Power Grid, Incorporated, and TISI Inc. among its shareholders. Details are provided in the company’s corporate profile.
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AT TOKYO reports 140,000 m² of total floor area for CC1 and calls it one of the largest data center buildings in Japan. “Total floor area” is a building-scale measure. It does not tell you how much space is dedicated to server rooms, how many racks the site can hold, or how many megawatts are available to IT equipment.
#1 Best Overall
- Save valuable floor space: 6U wall mount server cabinet Dimensions: 13.78" H x21.65" W x17.72" D.Maximum mounting depth is 14.2"
- Keep critical network equipment secure: glass door and side panels are lockable to prevent unauthorized access. Front door can be installed on either side of the front of the cabinet to satisfy your door swing orientation preference
- Easy equipment configuration: Fully adjustable mounting rails and numbered U positions, with square holes for easy equipment mounting with top and bottom punch-out panels for easy cable access
- Durability: Made of high quality cold rolled steel holds up to 110lb (50kg) (Easy Assembly Required)
- PCI & HIPPA and EIA/ECA-310-E compliant
The reviewed facility information does not establish a national ranking for CC1 by power capacity, IT load, server-room area or rack count. The safest comparison is therefore the one AT TOKYO makes: CC1 is one of Japan’s largest data-center buildings by total floor area.
What the 140,000 m² figure does—and does not—measure
- It measures: the combined floor area of the CC1 building.
- It does not measure: usable colocation floor, server-room floor area, rack capacity, electrical capacity, installed IT load or operating performance.
- It cannot be compared directly with: a facility’s site area, server-room area or megawatt rating unless the measurement category is the same.
This distinction matters because data-center announcements often use different units for different purposes. A large building can include offices, plant rooms, logistics areas, security zones and other non-server spaces.
How CC1 fits AT TOKYO’s wider network
AT TOKYO says its network includes 13 data centers in Tokyo, Osaka, Fukuoka and other Japanese cities. The company describes CC1 as a network hub connected with its other facilities, supporting connectivity, business continuity and network redundancy. Those are the operator’s service descriptions, not an independent measurement of traffic performance or availability.
Rank #2
- Save valuable floor space: 12U wall mount server cabinet Dimensions: 24.25" H x21.65" W x17.72" D. MAXIMUM MOUNTING DEPTH is 14.2".
- Keep critical network equipment secure: glass door and side panels are lockable to prevent unauthorized access; Front door can be installed on either side of the front of the cabinet to satisfy your door swing orientation preference
- Easy equipment configuration: Fully adjustable mounting rails and numbered U positions, with square holes for easy equipment mounting with top and bottom punchout panels for easy cable access
- Durability: Made of high quality cold rolled steel holds up to 110lb (50kg) (Easy Assembly Required)
- PCI & HIPPA and EIA/ECA-310-E compliant
For organizations using multiple sites, the network model can provide a way to distribute systems or connectivity across locations. The suitability of that design depends on the customer’s architecture, contracts, circuits and recovery objectives; the cited facility overview does not publish a CC1-specific uptime percentage or independently audited incident record.
Power, monitoring and physical security
In its overview of AT TOKYO’s strengths, the operator describes facilities with:
- multiple power feeds;
- uninterruptible power supplies (UPS);
- emergency generators;
- 24/365 operations and monitoring; and
- multiple levels of security.
These features are presented by AT TOKYO as part of its data-center operating approach. The source does not quantify CC1’s individual redundancy design, generator runtime, power density, service-level guarantee or audited uptime, so those figures should not be inferred from the 140,000 m² building area. See Why AT TOKYO? for the company’s description.
Rank #3
- Sturdy:4u server rack is construct from cold rolled steel, with a weight capacity of 110lbs(50kg); Electrostatic powder coat prevents rust and corrosion,quality finish
- Direct use:Open and use, not having to assemble it.Network rack can be placed flat or mounted on the wall,also can be installed vertically under the table
- Design Features:maximum mounting depth of 14 in,cables can be fixed on the side panel;Open frame server rack achieves effortless inspection, replacement and assemble
- Installation:wall mount network rack is easy to install,with instructions or videos for reference;Equipped with multiple accessories, suitable for different needs
- Application:EIA/ECA-310-E Compliant;wall mounted 4u rack fits all 19" racks and cabinets to hold various IT, network, and AV equipment;wall mount rack available in 4U, 6U, and 8U to choose
CC1 and CC3 are different facilities
AT TOKYO’s newer Chuo Center #3 (CC3) is not the same building as CC1. AT TOKYO announced CC3’s completion on May 28, 2024; operations began July 1, 2024. The announcement places CC3 in the Shibaura-Shinagawa area of Minato-ku and describes it as an interconnection hub for public-cloud services, internet exchanges and enterprise partners.
| Measure | Chuo Center (CC1) | Chuo Center #3 (CC3) |
|---|---|---|
| Operator | AT TOKYO Corporation | AT TOKYO Corporation |
| Published total floor area | 140,000 m² | Approximately 35,000 m² |
| Site area | Not stated on the cited CC1 facility page | Approximately 8,000 m² |
| Server-room area | Not stated on the cited CC1 facility page | Approximately 8,000 m² |
| Rack capacity | Not stated on the cited CC1 facility page | 3,000 racks |
| Total power capacity | Not stated on the cited CC1 facility page | Approximately 40 MW |
| Primary role described by AT TOKYO | Large data-center building and network hub | Interconnection hub for cloud, internet-exchange and enterprise connections |
CC3’s figures come from AT TOKYO’s May 28, 2024 completion announcement. Its 40 MW, 3,000-rack and 8,000 m² server-room figures must not be attributed to CC1.
Quick Recap
What readers can reasonably conclude
- CC1 is a very large AT TOKYO facility when measured by total building floor area.
- The published 140,000 m² number is not a capacity specification for computing or electrical power.
- AT TOKYO positions CC1 within a connected, multi-city data-center network.
- Resilience and security capabilities are described by the operator, but the reviewed material does not independently verify CC1-specific uptime or incident performance.
- CC3 supplies the publicly reported figures for 40 MW and 3,000 racks; those numbers describe a separate facility.
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