NTT Communications has launched its sixth data center in Tokyo – the 22,000 sq m Tokyo No.6 facility - which can accommodate 3,000 racks.

NTT said the facility is currently the largest-scale data center in the Japanese city.

The facility features energy-efficient water-cooled air conditioning, low-power-loss rotary uninterruptible power supply (UPS), reduced-power air conditioning system through use of cooler outdoor air and efficient air-flow management to prevent the circulation of server-generated heat.

NTT is claiming a power usage effectiveness (PUE) of 1.2 for the facility, which it said is the highest attained by Japanese data centers.

The facility has been designed to make the maximum use of space, containing racks designed to handle equipment up to 1.5 times larger than conventional racks, which NTT said helps to lower user costs by as much as the half compared to previous rates.

NTT said the facility also features a seismic isolation structure that can reduce the impact of earthquakes by 80%.

“Resistance is rated to withstand forces as powerful as those generated by the unprecedented Great East Japan Earthquake of 2011,” NTT said.

“An extra-strong ground helps to prevent liquefaction, and the building foundation is 1.4m higher than ground level to avoid flooding. Redundant major power supply and air conditioning systems strengthen reliability and the facility has a direct connection to a large aseismic cable tunnel that protects lead-in cables from damage by earthquakes or drilling."

The new data center uses NTT Com's Arcstar Universal One(TM) enterprise network service and other global network services for connectivity with global data centers and virtual networks to enable flexible establishment and operation of system expansion, system distribution and disaster-recovery sites.

NTT said services will be offered under its new Nexcenter brand, which takes a global approach to standards and services for its operations around the world.