Tokyo colocation and Japan data centers: 145 facilities compared

Tokyo colocation directory and Japan buyer checklist

Coloprice tracks 145 data center facilities in Japan from 38 operators. 124 are operational and sites with a published capacity total approximately 2580+ MW. Tokyo and the surrounding Inzai cluster account for 76 facilities, including 66 operational sites and 1591+ MW of disclosed capacity.

Tokyo colocation is two connected products. Central carrier and financial-network sites sell interconnection-rich rack space, while larger campuses in Inzai and Chiba sell expandable power blocks over metro fibre. Compare the exact facility and phase rather than treating every Tokyo address or operator brand as equivalent.

Japan is the most expensive major Asia-Pacific power market after Singapore in the current index. Buyers should request itemized capacity, metered electricity, cross-connects, setup, remote hands and annual escalation, and should verify Japanese-language operating procedures, disaster-recovery design and the actual delivery date before contracting.

• 15 tracked Japan facilities are currently marked AI-ready; confirm rack density and liquid-cooling scope for the proposed hall.
• Separate central Tokyo interconnection inventory from Inzai and Chiba campus capacity.
• Verify whether published MW describes live IT load, utility supply, one phase or the full future campus.
• Treat certification scope and operator claims separately, and request the underlying design or certificate evidence.
• Send every provider one requirement set for committed kW, density, redundancy, carriers, delivery, term and expansion rights.