AT TOKYO CC1 (Chuo Center 1)

AT TOKYO CC1, also known as Chuo Center 1, is the flagship building of AT TOKYO's Chuo data center campus in the Toyosu district of Koto-ku, Tokyo. Built in 2001 inside a former TEPCO facility, the building is regularly described in Japanese trade press as one of the largest single-building data centers in the country, with roughly 140,000 square meters of total floor area across multiple tenant floors. AT TOKYO (formerly branded @Tokyo) operates the Chuo campus as a cluster of interconnected buildings — CC1, CC2 and CC3 — serving as a major carrier-neutral interconnection point in eastern Tokyo alongside the operator's Fuchu and Kansai campuses. The operator's own site is not reachable through automated tools due to bot-blocking, so this entry relies on independent trade-press coverage of the facility rather than a direct operator page; no power capacity, certification, or rack count figures are published through the sources available. AT TOKYO markets the Chuo campus heavily on its role as an internet exchange and interconnection hub for Japanese and international carriers.