Realizing a Low-Carbon Society

To realize a sustainable society, we make efforts to address climate change, set medium-term targets for reducing our environmental impact, and work with the supply chain to achieve the targets.

Environmental Data

Outline of Environmental Load

This is the material balance diagram of The Z Holdings Group for fiscal 2020. The target is Yahoo Japan Corporation and the group companies on the site, and the group companies shown below in the figure. In the course of its business activities, The Z Holdings Group will supply 287 million kilowatts of electricity, 122 thousand tons of gas, 688 Thousand ㎥ of water, 110.0 tons of paper, 97 kl of heavy oil for emergency generators, 582 kl of kerosene for boilers, 115 kl of gasoline for automobiles, and 547 kl of light oil for diesel vehicles. Utilization of CO2 is 118 Thousand  t-CO2, water discharge is 688 Thousand ㎥, and the waste is 4,747, recycling rate is 81.6%. In addition, Scope 3 emits 2,248,755 t-CO2. Breakdown includes Category 1: Purchased products and services 1,162,808t-CO2, Category 2: Capital goods 149,377t-CO2, Category 3: Fuel and energy activities not included in Scope 1,2 16,212t-CO2, Category 4: Transportation, Delivery (upstream) 31,494t-CO2, Category 5: Business waste 1,068t-CO2, Category 6: Business trip 478t-CO2, Category 7: Employee commuting 4,134t-CO2, Category 9: Transportation, Delivery (downstream) 603,376t -CO2, Category 11: Use of sold products 139,342t-CO2, Category 12: Disposal of sold products 140,465t-CO2.
The Z Holdings Group’s material balance (fiscal 2020)
  • *For material balance coverage, please see here.

Gross CO2 Emissions and Total Energy Consumption

The figures are the total of the Z Holdings Group companies. CO2 emission per energy consumption is decreasing due to improved energy use efficiency in data centers.

Fiscal Year
Scope 1 & 2 Gross CO2 Emissions (t-CO2
Scope 3 Gross CO2 Emissions(t-CO2
Total Energy Consumption(GJ)
CO2 Emission per Energy Consumption(t-CO2/GJ)
  • *CO2 emissions until fiscal 2015 are calculated including those for leased-out assets (data center of IDC Frontier Inc.) and excluding borrowed rental assets (data center of BroadBand Tower, Inc.). From fiscal 2016, figures for leased-out assets are excluded, but those for borrowed rental assets are included.
  • *For the coverage of each environmental index, please see here.

Environmental Impact of Our Data Centers

The environmental impact of data centers used by Yahoo! JAPAN is as follows. The renewable energy ratio is increasing as a result of transition to our U.S. data centers that are powered almost entirely by renewable energy, among other efforts. We will strive to further increase this renewable energy ratio.

Fiscal Year
Total Energy Consumption(GJ)
Renewable Energy Consumption(GJ)
Renewable Energy Ratio(%)
Average PUE
  • * With respect to Renewable Energy Consumption and Renewable Energy Ratio, only the electricity that we directly purchase after we have specified the power sources is included in these figures. Renewable energy included in the electricity we procure from electric power companies without specifying the power source is not included in these figures.
  • * For average PUE, we reviewed the calculation method for the data centers owned by Yahoo! JAPAN and updated the figures. Past figures have been retroactively revised. (May 2021)

Climate Change Strategies

Policy for Addressing Climate Change

A healthy global environment is the basis on which people’s lives and society function. Without it, there can be no development of an information technology society. The Z Holdings Group strives to address climate change by setting goals in terms of “mitigation” and “adaptation.” In terms of “mitigation,” we carry out various initiatives to reduce the emission of greenhouse gas (GHG), which is the cause of climate change and global warming. In terms of “adaptation,” we take measures based on an outlook that global warming will continue for the time being. In particular, we address increasingly intensifying disasters as a priority area, along with BCP. Going forward, we intend to engage in further measures such as shifting to 100% renewable energy.

Targets for “Mitigation” of Climate Change

Mid-Term Goals
By FY2028: reduce CO2 emissions per revenue by 50% from FY2008 levels (45,181t-CO2 / 265,754 million yen)
Down 37.6%
Down 33.9%
Down 42.4%
  • *The revenue for FY2008 is based on JGAAP, and the revenues from FY2017 onward are based on International Financial Reporting Standards (IFRSs).

Initiatives related to “Mitigation” of Climate Change

Efforts toward carbon neutrality

While aiming to announce medium- and long-term environmental targets as the Z Holdings Group, each company in the Group is working toward becoming carbon neutral.

・Introduction of Renewable Energy Plan
Started to introduce RE100-compliant effectively renewable energy to the Shirakawa Data Center. (May 2021)

・Public invitation to enterprise hometown tax donation program
Started to publicly invite local governments to participate in “Yahoo! JAPAN Regional Carbon Neutrality Promotion Project,” with an aim to promote expansion of renewable energy supply sources and to support local governments’ carbon neutrality efforts. (April 2021)

・Electricity in the offices
In addition to reducing the use of electricity in its offices through its new work style (encouraging remote work), Yahoo! JAPAN purchases Green Power Certificates equivalent to the amount of electricity used in its main office buildings starting in FY2021, with the aim of achieving the goal of converting its office electricity use to renewable energy.

・Commitment to setting of science-based targets
Yahoo! JAPAN committed itself to setting science-based targets (SBTs), the greenhouse gas emissions reduction targets aligned with the Paris Agreement targets. (April 2021)

・Declaration of Renewable Energy Challenge
Yahoo! JAPAN declared its commitment to achieving the shift to 100% renewable energy by the end of fiscal year 2023. (January 2021)

Data Center Initiatives

Most of the servers necessary to operate Yahoo! JAPAN’s Internet business are managed by its own facilities. In particular, at the Kitakyushu Data Center (Kitakyushu City, Fukuoka Prefecture) and the Shirakawa Data Center (Shirakawa City, Fukushima Prefecture), Yahoo! JAPAN implements measures to combat global warming using the latest technologies, including the installation of air conditioning systems that use outside air. We also work to improve the efficiency of energy use by continuously replacing facilities and making new capital investments.

Transition to the US Data Center

The U.S. subsidiary of Yahoo! JAPAN, Actapio, Inc. (former YJ America, Inc.) constructed a new data center in Washington State with approximately 1600 racks. It started operations in April 2019. The data center is located in Washington State, where hydraulic power generation is prevalent, and uses nearly 100% renewable energy for its operation. Actapio, Inc. started operation of Yahoo! JAPAN’s first data center outside of Japan (200 racks) in December 2014 in Washington State. With the construction of this new data center larger in scale, the renewable energy ratio in Yahoo! JAPAN’s facilities has increased even further.

Issuance of Green Bonds

With the aim of accelerating its carbon neutral initiatives, Z Holdings Corporation issued green bonds (JPY 20 billion) as a means of raising funds for projects that contribute to solving environmental issues. This is the first issuance of green bonds in the Internet sector. The funds procured form the issuance of this green bond will be allocated to expenditures for constructing, refurbishing, acquiring and operating energy-efficient data centers, as well as to the procurement of renewable energy-based electricity to be used at data centers.

Provision of recycling services

The Z Holdings Group is expanding and enhancing its recycling-oriented services that contribute to the realization of a sustainable society. For details, please visit the following web page.

Target for “Adaptation” to Climate Change

Target for “Adaptation” to Climate Change
Conclude disaster alliance agreements with local municipalities to cover 90% of Japanese population by fiscal 2025

Initiatives related to “Adaptation” to Climate Change

The Z Holdings Group responds to the threat of natural disasters that are becoming more intense and frequent due to climate change, by working with local municipalities and related organizations and providing services that help prevent and mitigate disasters. We are also actively engaged in post-disaster reconstruction support. For details, please visit the following web page.

Realization of Sustainable Supply Chains

Initiatives to Realize Sustainable Supply Chains

The Z Holdings Group carries out procurement activities based on its Basic Policy on Procurement, which places emphasis on “fairness,” “security,” and “consideration of human rights” among others. In respecting the environment, we have provided a section titled “Environmental Conservation” in the Basic Policy on Procurement, based on which we procure goods and services with low environmental impacts. We have also included “Consideration for the Environment” in our evaluation criteria for our business partners and suppliers, through which we assess whether clients actively give consideration to environmental issues.
Furthermore, in procurement activities through the procurement division, which account for most of the procurements for the company, we ensure that the division enters into a business agreement that stipulates compliance with the Basic Policy on Procurement with its clients before carrying out business.
We practice sustainable procurement by increasing the proportion of office supplies, etc. procured in a sustainable manner.

We are also making efforts to achieve a shift to 100% renewable energy for electricity used at our data centers.

Communications with Environmental NGOs

In 2019, we received an engagement from an environmental NGO, Rainforest Action Network, on the possible risk of procuring paper from a manufacturer that produces paper that does not meet the procurement standard of paying due consideration to sustainability. As a result of investigations, we found out that we had an indirect transaction with the applicable manufacturer, thus we changed our procurement source to a partner that meets the business partner evaluation criteria of “consideration for environmental issues” and “securing of occupational health and safety”, etc.

Third-Party Verification

Third-Party Verification of Greenhouse Gas Emissions and Energy Consumption Volumes

In order to ensure high reliability of our reported environmental data, Yahoo! JAPAN, along with its parent company SoftBank Corp., underwent third-party verifications that are compliant with ISO14064-3 and ISAE3000, for objective evaluation of our environmental data.
The verification was conducted at the “limited assurance level” and the scope of organizations covered were Yahoo! JAPAN (including its overseas bases) and its parent company SoftBank Corp. (including its base stations) for greenhouse gas emissions and energy consumption, the headquarters of SoftBank Corp. for water consumption, and SoftBank Corp. for industrial waste disposal..
For fiscal 2020, the verification was conducted with respect to greenhouse gas emissions and energy consumption volumes under Scopes 1 and 2, and greenhouse gas emissions, water consumption and industrial waste disposal under Scope 3 (Categories 1 – 3, 5 - 7, 9 for Yahoo! JAPAN and 1 - 8, 11 – 12, and 14 for SoftBank Corp. ) As a result, there was no item that was found to be “non-compliant with the calculation rules and not accurately calculated.”
Going forward, we will expand the scope of activities and organizations to be covered by verification.

Greenhouse gas emissions verification report


Coverage of Environmental Index

The table below shows the coverage of each environmental index reported on this page (derived by summing the consolidated revenue ratio of the Group’s consolidated subsidiaries for which we were able to compile data). For more details on these environmental indexes (breakdowns of Scope 1 and Scope 2, green purchasing ratio), please refer to the related link.

Environmental index
CO2(Scope 1 & 2)
Total energy
Water, water discharge
Automotive gasoline
Recycling rate
Heavy oil for emergency generators
Renewable energy consumption & ratio
Light oil for diesel engine vehicles
CO2(Scope 3)
Paper recycling
Carbon offset
Investment in biodiversity protection
Kerosene for boilers