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- The KDDI Group Achieves 100% Renewable Energy Use Across All Data Centers Worldwide
The KDDI Group Achieves 100% Renewable Energy Use Across All Data Centers Worldwide
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2026年4月30日
April 30, 2026
KDDI Corporation
The KDDI Group today announced that as of March 31, 2026, it has achieved its environmental target of sourcing 100% of the electricity used at all of its data centers worldwide [
1] from renewable energy [2], achieved through a combination of PPAs, renewable energy retail products, utility renewable energy programs, and environmental attribute certificates (EACs), including RECs, REGOs and GOOs.This includes Telehouse facilities in Japan and overseas, as well as the Osaka Sakai Data Center.
This achievement has been made possible through the proactive procurement of renewable energy combined with energy-saving initiatives in response to the rapid expansion of data centers and the sharp increase in electricity demand in the AI era.
The KDDI Group has commercially deployed liquid cooling technology to efficiently cool GPUs at some of its data centers, and is implementing initiatives such as the reuse of waste heat in collaboration with regional energy companies in Japan and overseas.
<Telehouse London Docklands North Two>
<Osaka Sakai Data Center>
Through these initiatives, the KDDI Group aims to contribute to the decarbonization of customers that use its data centers and to pursue data center operations that are chosen for their environmental performance.
The KDDI Group has formulated the "KDDI GREEN PLAN," a medium- to long-term environmental action plan designed to accelerate the realization of a decarbonized society. The achievement announced today is one of the key initiatives under this plan.
The KDDI Group will continue to fulfill its responsibility as a provider of digital infrastructure aligned with our renewable energy and greenhouse gas emissions reduction targets under the KDDI GREEN PLAN and, through collaboration with partner companies, contribute to the realization of net zero across society as a whole.
(Reference)
■Key Initiatives
1. Renewable Energy Supply Initiatives
- (1) Power generation supply to the KDDI Group facilities by au Renewable Energy Corporation
-
To secure additional renewable energy capacity in Japan, the KDDI Group established au Renewable Energy Corporation in January 2023 as its energy business subsidiary [
3].
The company develops and operates power generation facilities, primarily solar power generation, and supplies the generated electricity to the KDDI Group's own facilities, including data centers, base stations, and telecommunications facilities.
<A solar power plant in Kumagaya City, Saitama Prefecture, operated by au Renewable Energy>
- (2) Contribution to new power generation development through long-term procurement using virtual PPAs
-
KDDI has entered into virtual Power Purchase Agreements (PPAs) to procure, over the long term, the environmental value generated through the development of new power generation facilities such as wind farms. [
4]
Virtual PPAs are a mechanism through which KDDI supports the development of new renewable energy generation capacity while securing the associated environmental attributes.
2. Initiatives at Data Centers
As GPUs continue to increase in performance in the AI era, their operation requires large amounts of electricity and high-capacity power facilities, while higher heat generation accompanies server performance improvements. Consequently, highly efficient cooling technologies are essential for operating AI-ready data centers.
KDDI's data center business has been operated using 100% renewable electricity (including certificates) since 2019.
- (1) Data Centers in Japan
-
The Osaka Sakai Data Center, which commenced operations in January 2026, uses 100% renewable electricity supplied through a utility renewable energy program and is the first KDDI facility to introduce large-scale liquid cooling technology in a commercial environment. [
5]
In addition, at the Telehouse Shibuya Data Center, which opened in April 2025, KDDI is working with partner companies across multiple industries to establish new cooling technologies and to develop and verify highly efficient power supply systems, advancing the verification and commercialization of new technologies.
- (2) Data Centers Overseas
-
Under KDDI's data center brand "
Telehouse," the KDDI Group operates more than 45 sites in over 10 countries and regions worldwide.
With over 30 years of operational experience, Telehouse facilities are characterized by their reliability and service quality, and are equipped with high power supply capacity, highly efficient and reliable power systems, and energy-efficient air-conditioning facilities.- [1] Telehouse Germany: Reuse of Waste Heat
-
In partnership with a regional energy company, Telehouse Germany plans to launch an initiative in the second half of fiscal 2026 to supply waste heat generated at the data center for reuse in nearby residential buildings.
- [2] Telehouse Canada: Deep Lake Water Cooling System
-
Telehouse Canada has introduced an environmentally conscious system that simultaneously cools data centers and reuses waste heat by leveraging heat exchange technology.
Cold water from Lake Ontario is used to efficiently cool the data center, and the waste heat generated in the process is reused to warm municipal drinking water for local residents.
■About the KDDI GREEN PLAN
KDDI is currently promoting its environmental action plan, the KDDI GREEN PLAN. Based on its management philosophy of achieving harmony with the global environment, KDDI has identified the realization of a decarbonized society, the formation of a circular economy, and the conservation of biodiversity as key priority issues.
In addition, to enhance corporate value over the mid- to long-term, KDDI has established new goals for risk mitigation and the creation of business opportunities, and will promote further initiatives to enhance environmental value.
