AT T O K Y O
En v i r o n m e n t a l I n i t i a t i v e s2 0 21（ Iss u e d i n 2 0 2 2 ）Eco-friendly while Providing Peace of Mind
We, AT TOKYO data centers, promise safety and security
for your business, maintaining high-level service
and zero-downtime operation.
We remain highly conscious of the environment,even as we consume large amounts of energy
and operate various facilities every day.

Realizing zero downtime,and providing safety and security
for your businesses.

Environmental considerations
such as utilizing renewable energy
and promoting recycling.

AT TOKYO aims to provide environmentally friendly data centers.

NEWSReceived the Grand Prize of the Electricity Use Rationalization
Committee Chairman's Award

Chuo Data Center (CC1) reduced electricity and water consumption byreplacing existing water-cooled packaged air conditioners upon renewal
with highly efﬁcient air-cooled packaged air conditioners. It also removed
the 400V to 200V three-phase transformers and installed a new 400V
packaged air-conditioner for loss reduction.
Additionally, Chuo Data Center #2 (CC2) reduced power consumption byincreasing the heat exchanger capacity to enable free cooling while lowering
the ratio of pre-cooling operation. These highly evaluated achievements
earned them the Grand Prize of the Electricity Use Rationalization Committee
Chairman's Award.

Award of CC1

Award of CC2

AT TOKYOʼs Energy Conservation by Numbers
Because data centers consume a large amount ofenergy, AT TOKYO has worked on reducing greenhouse gas emissions through a variety of efforts,
both large and small.
AT TOKYO not only meets greenhouse gas reduction
obligations, but also expands the volume of its
reduction every year at Chuo Data Center (CC1),
Chuo Data Center #2 (CC2) and Data Center #3(DC3). In FY2020, the bankable reduction amountwas 14.4% higher than in FY 2016, when the threecenters were assessed. In addition, we reused coolingwater that would otherwise have been disposed of toreduce the amount of used cooling water (blow-downwater) used to process the heat generated in theserver room; in FY2021, we successfully reused a
total of 15,860m3 of the water.

Speciﬁed Greenhouse Gas Actual Emissions and Reduction for Fiscal Year 2020
100%75%

Reduction rate

Reduction rate28 %Reduction

36,200t

Actualemissions

94,035t

16,328t

18 %Reduction rate

26 %5,995t50%

25%0%75,067t

16,676t

AT TOKYO Chuo Data Center (CC1) AT TOKYO Chuo Data Center #2 (CC2) AT TOKYO Data Center #3 (DC3)● The target emission amount agreed with the Tokyo Metropolitan Government (TMG) is
indicated as 100%. Reduction = Emission amount agreed with the TMG - Actual emissions

Blow-down Water Reuse Rate during 2021

Average 38.2 %April to
June

July toSeptember

October toDecember

January toMarch

Blow-down Water

9,400m 3

11,136m 311,195m 3

9,777m 3

Reused Water

4,191m 3

2,575m 3

4,883m 3

4,211m 3

Reuse Rate

44.6%

23.1% ※

43.6%

43.1%

* The lower percentage resulted from a decrease in the amount of collectable reused water, as most of the equipment was not in operation due to repair.

Achieving Expansion of Computer Rooms and Equipment
as Well as Energy Conservation with Zero Downtime
̶ CC2 was Recertiﬁed as a Top-Level Facility ̶The Tokyo Metropolitan Government certiﬁes businessfacilities that take particularly outstanding global warming countermeasures as Top-Level facilities. This is theﬁrst recertiﬁcation year for the Chuo Data Center #2(CC2) since it was certiﬁed in FY2015.

The center was able to obtain the Top-Level Facilities
certiﬁcation again in recognition of its efforts to promoteenergy-saving measures, such as improving the capacity ofheat exchangers, while implementing the expansion ofcomputer rooms and equipment with zero downtime.

Top-Level
Facilities certiﬁcation

Top-Level Facilities assessmentin progress
Project team member who received the Top-Level Facilities certiﬁcation

INTERVIEW
Behind the scenes in AT TOKYOʼsenvironmentally friendly data centers
AT TOKYO realizes 24/365 zero downtime operation as a leading data center colocation service company, providing
carrier-neutral, ﬂexible connections. So, what does sustainability mean to AT TOKYO? Here, we introduce the voices ofAT TOKYO members who are making consistent and forthright efforts toward achieving a carbon-free society throughwhat we can do as data centers.

Being Certiﬁed as a Top-Level Facility Isnʼt our Goal, but a Beginning
During the updating of certiﬁcation for CC2, we faced

on to future generations. We have been working toscheduling and communications difﬁculties between ourvisualize and organize data using our DCIM (Data Centerteam members, caused by factors such as as remote workingInfrastructure Management) system so that we canand shift work. Therefore, obtaining recertiﬁcation under such

respond to team member changes and guideline revisions.

circumstances gave us a great sense of accomplishment. We

We will continue to cooperate with our customers torecognize that obtaining certiﬁcation is not a goal in itself, butachieve even higher efﬁciency in our data centers.

merely the beginning, and it is important to continue
improving our energy conservation performance to pass it

Masashi Tsuruta, Senior Engineer,
Operation Planning Group, Facility Operations Dept.

Air Cooling of the Packaged Air Conditioning Systems Was Realized
through Cooperation between the Manufacturer and Our Company
We received a recognition for introducing air-cooled

we conducted CFD* analysis and other methods to conﬁrm

packaged air conditioners in order to conserve the power ofthe suitability of the installation environment. This was

the air conditioning for CC1. We took great care in updating

probably the most important point for air cooling of thethe heat rejection equipment while maintaining operation of

packaged air conditioning for CC1. We will continue toboth the air-conditioning and monitoring functions withinpromote energy-saving efforts through cooperation

the CPU rooms. Normally, AC outdoor units are installed

between the manufacturer and our company.

o u td o o rs , b u t i n t h i s c a s e , t h e y we re lo c a te d i n asemi-outdoor locations, so there was a possibility that

Kenji Shigehara, Manager,
Center for control and operation, Facility Operations Dept.

exhaust heat might be trapped within the space. Therefore,* Computational Fluid Dynamics: Refers to airﬂow analysis in this case.

Aiming to Achieve a Sustainable Society via Data Center Businesses
It is essential to advance measures for the environmenti m p o r t a n t to p ro te c t t h e h e a lt h a n d s a fe t y o f o u r

and occupational health and safety from international andemployees. We will strengthen our management systemlong-term perspectives. A shift to renewable energy is one

in compliance with ISO 45001 (Occupational Health andof our top priorities. As a ﬁrst step, in October 2022, we

Safety Management Systems) to create a workplace

will launch the Customer Sustainability Support Program,environment that ensures the safety, security, and healthwhich provides to our customers the environmental valueof our employees.

originating from renewable energy sources. In line with
our mission of 24/365 zero downtime operation, it is also

Kiminori Kobayashi, General Manager,
Sustainability Dept. Strategic Planning Ofﬁce

AT TOKYO will continue to maintain its high awareness of energy conservation and the environment,
aiming to enhance the convenience of its customers from diverse industries,
while constantly striving to be the most highly evaluated data centers for each and every customer.

AT TOKYO Corporation

https://www.attokyo.co.jp/

5-6-36 Toyosu, Koto-ku, Tokyo, Japan TEL：03-6372-3500 FAX：03-6372-3009

Mail:at-sales@attokyo.co.jp©2022

AT TOKYO Corporation. All rights reserved.

22-2819161