Data center energy consumption in Japan is set to triple by 2034, becoming the country’s single largest driver of power demand growth, according to Wood Mackenzie.

The report projects consumption will rise from 19TWh in 2024 to between 57TWh and 66TWh by 2034, equivalent to the annual electricity use of 15 to 18 million households. Peak demand is forecast to climb to 6.6–7.7GW, or around four percent of Japan’s total peak load, which is three times the current levels.

The surge follows the government’s selection of Oracle, Google, and Microsoft as official cloud providers, triggering an expected $28 billion of hyperscale investment. However, the report notes that, while significant, Japan’s data center load will remain well below US benchmarks, where data centers could account for up to 15 percent of peak demand by 2034.

Despite the growth, infrastructure bottlenecks could threaten project timelines. Hyperscalers typically seek deployment within five years, yet gas turbine plants needed to support growth can take up to a decade to complete. The report argues that this mismatch is already pushing some large-scale data center and chip foundry projects toward 2029.

Power demand will be concentrated in the Tokyo and Kansai regions, where data centers are expected to account for about seven percent of load by 2030. While near-term shortages are unlikely thanks to reserve margins above 15 percent, the report argues that a long-term reliance on fossil fuels poses a major decarbonization challenge. Coal and gas will still make up more than 40 percent of capacity in 2034, with renewables expected to reach 17 percent by 2030.

Major hyperscalers have begun to sign renewable Power Purchase Agreements (PPA) in the country over recent years. In January, Amazon signed two solar PPAs in the country with EDP Renewables APAC and X-Elio. Before this, in May of last year, Google signed its first PPAs in the country with Clean Energy Connect and Shizen Energy.

However, the report noted that meeting both climate goals and hyperscaler sustainability commitments will require faster renewable deployment and nuclear restarts. Data centers, it concludes, will become central to grid planning and investment, reshaping Japan’s power sector over the next decade.

This will be even more important given the massive investments announced by major data center firms in the country. Google has committed to investing nearly $690 million into sustainable infrastructure in Japan, while Amazon plans to invest 2.26 trillion yen ($15.24 billion) in expanding its cloud computing infrastructure in Japan by 2027.

https://www.datacenterdynamics.com/en/news/data-center-energy-consumption-in-japan-to-triple-by-2034-report/