Tokyogasgroup csr report

Enhancement of Energy Security

Earthquake and Disaster Preparedness

Tokyo Gas addresses earthquake and disaster preparedness under the three pillars of prevention, emergency and restoration so that customers can use gas safely and conveniently at any time, 24 hours a day and 365 days a year. In the event of a disaster, we strive to minimize the impact on customers.

Prevention

Highly Earthquake-resistant Facilities
We employ multiple layers of safety in addition to reinforcing city gas production and supply equipment and facilities. Important facilities are designed to withstand earthquakes as powerful as the 7.3-magnitude Great Hanshin-Awaji Earthquake in 1995 and the 9.0-magnitude Great East Japan Earthquake in 2011.

LNG Tanks
Tanks used for storing imported LNG are designed to maintain high structural integrity that can fully withstand major earthquakes. There have been no incidents of LNG leakage from any major earthquake.

High-pressure and Medium-pressure Gas Pipelines
These gas pipelines, connecting LNG terminals and district pressure regulators, are made of strong, flexible materials that can withstand the impact of ground movement caused by earthquakes.

Gas Holders
These containers hold the gas supplied in response to demand and feature a robust structure of multiple steel plate layers.

Low-pressure Gas Pipelines
A low-pressure gas pipeline comprises about 90% of the total length of a gas pipeline, and newly installed low-pressure gas pipelines are made of polyethylene to minimize damage caused by earthquakes.
 
  • Sodegaura LNG TerminalSodegaura LNG Terminal
  • High-pressure gas pipelineHigh-pressure gas pipeline
  • Gas holderGas holder
  • Low-pressure gas pipesLow-pressure gas pipes
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Emergency

Quick Shutdown of Gas Supply to Prevent Secondary Disasters
Our system is capable of remotely shutting down gas supply to individual buildings as well as to entire zones in the event of a major earthquake. In addition, the gas pipeline network is separated into regional blocks to minimize the inconvenience of a gas supply suspension.

How Gas Supply Is Shut off to Individual Houses

In each house, intelligent gas meters are equipped with a safety device that will automatically cut off gas supply to individual buildings when it detects earthquakes measuring 5 or greater on the Japanese seismic scale or an abnormal gas flow. Moreover, multiple layers of safety, including safety features of gas cocks and appliances, are in place to completely safeguard homes. Emergency shut-off valves at underground malls and skyscrapers can be remotely controlled from their disaster management center or building manager office to suspend gas supply to the entire facility.

Gas meter
Gas meter

Underground mall/room

Underground mall/room

Skyscraper

Skyscraper
 

*In case of a fire, regardless of whether an earthquake strikes, Tokyo Gas cuts off gas supply to individual buildings, and employees can close shut-off valves to further guarantee safety. These valves cannot be operated by customers.

Shutting off Gas Supply to Entire Districts Severely Impacted by a Disaster

In our service area, about 4,000 district pressure regulators, which convert medium-pressure gas to low-pressure gas, are equipped with seismographs to automatically shut off gas supply when a major earthquake is detected. Gas supply can also be cut off remotely. One seismograph is located in every square kilometer, an unprecedented density in the world, for monitoring the safety of each district.


 

Topic
SUPREME

Our SUPREME earthquake and disaster preparedness system uses densely installed seismographs. The system is capable of collecting earthquake data at about 4,000 locations, remotely shutting down district pressure regulators, and estimating damage on gas pipelines in order to monitor district safety. Within about five minutes after a major earthquake, the system identifies damage based on data gathered by seismographs. In about ten minutes, the system swiftly ensures safety by remotely operating district pressure regulators and suspending gas supply to areas where major damage is expected.

 
Locations of Seismographs in the Tokyo Gas Service Area and Temblor Strengths in the Southern Kanto Region during the Great East Japan Earthquake on March 11, 2011

Locations of Seismographs in the Tokyo Gas Service Area and Temblor Strengths in the Southern Kanto Region during the Great East Japan Earthquake on March 11, 2011

DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Restoration

Safe and Swift Restoration of Gas Supply

We strive to restore gas supply as soon as possible to end the inconvenience in districts where service has been suspended, by effectively using equipment and systems made available during routine preparations and maintenance work, while closely cooperating with other gas utilities. Furthermore, we began introducing a system for remotely operating district pressure regulators in fiscal 2014 toward realizing same-day gas supply resumption in districts with no earthquake damage. We are working to apply this system to all such regulators.

Post-disaster Relief and Support System

We drew lessons from relief activities after the 1995 Great Hanshin-Awaji Earthquake and 2007 Niigata-ken Chuetsu offshore Earthquake and deployed mobile gas generation equipment (large PA-13A) to high-priority customers such as hospitals to serve as relief and support equipment for those facilities as kitchens. Mobile equipment was used in the wake of the Great East Japan Earthquake in 2011.
To promote support measures carried forward from fiscal 2017, we will update customer information and provide education and training that use actual equipment in fiscal 2018.
We have arranged with gas utilities in Japan via the Japan Gas Association to provide personnel and equipment to each other in the wake of a major disaster. The Tokyo Gas Group resumed its service in the aftermath of the Great East Japan Earthquake to some 30,000 of its customers in about a week and dispatched support personnel to six other gas utilities for about two months (up to 1,950 members a day). After the 2016 Kumamoto Earthquake, we engaged in gas pipe repair and restoration work with other gas utilities nationwide to achieve the resumption of gas supply to all affected customers in about two weeks. We are committed to rapidly achieving post-disaster service restoration.

Mobile gas generation equipment
Mobile gas generation equipment

 
Topic
Relief Response to Northern Osaka Prefecture Earthquake

After a 6.1-magnitude earthquake struck northern Osaka Prefecture on June 18, 2018, the Tokyo Gas Group supported work to restore the city gas service. We set up a local restoration task force within the day and dispatched about 1,200 personnel for restoration work with Osaka Gas Co., Ltd. and other gas utilities. As a result, gas service resumed for all customers in areas where it was needed, on June 24, six days after the quake. During the restoration period, the entire Tokyo Gas Group rendered support, including subsidiaries and affiliates such as ENETRUST, a gas pipeline construction company, Tokyo Gas LIFEVAL, Enesta and a drawing company. The entire Group is ready to do everything possible to restore service in response to future disasters.

Workers engaged in restoring gas service

Workers engaged in restoring gas service

Personnel working in a shelter to collect data on valves opened after the shut-off

Personnel working in a shelter to collect data on valves opened after the shut-off
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.

Routine Disaster Preparedness

Tokyo Gas has established a business continuity plan (BCP) and routine disaster preparedness system against the risk of a major earthquake in the Tokyo metropolitan area.

Development of a Business Continuity Plan (BCP)

To cut off gas supply to prevent secondary disasters while continuing to safely supply gas in less affected areas, Tokyo Gas reviews all of its more than 600 operational procedures to prioritize business activities in times of a disaster.
When the supply of gas has been interrupted in certain areas, a company-wide effort is made to promptly restore service through such measures as assigning staff responsible for operations in the suspended areas to recovery work.

Establishment of Backup Centers

Our systems are housed in a data center that meets high seismic standards. We have also established a backup center in case of a major disaster to maintain access to equipment and data primarily for safeguarding systems related to customer information and emergency safety operations so that we can swiftly restore services. In addition, emergency drills are regularly conducted, and redundancy is built into power supply and communication systems to minimize impact on customers during an emergency.

Comprehensive Disaster Prevention Drills

We have conducted comprehensive disaster prevention drills annually since 1983 to raise the level of the Tokyo Gas Group’s response to disasters. The drills are intended to confirm and verify that every team from the Emergency Response Organization is capable of acting in accordance with the guidelines to provide an initial response, facilitate transition to recovery, and ensure reliable collaboration with gas retailers that are new to the market.
Comprehensive disaster prevention drill
Comprehensive disaster prevention drill

Disaster Recovery Systems

Tokyo Gas operates an integrated system for monitoring the real-time status of our disaster response, which enables employees to share accurate information and swiftly take appropriate action to minimize damage. Earthquake data collected by our SUPREME system is sent to employees’ mobile phones within minutes of an earthquake and can also be used to confirm their safety and deliver instructions on reporting for duty during an emergency. Our earthquake data is also used by local authorities and government agencies.

The “Disaster Information Station” site on the Tokyo Gas intranet
The “Disaster Information Station” site on the Tokyo Gas intranet
DFF Inc., Corporate Social Responsibility Sect, General Administration Dept., Corporate Planning Dept., Resources & Global Business Division, Energy Solution Div, Power Buisiness Dept., Pipeline Network Division, IT Division, Residential Sales Div., Fundamental Technology Dept., Energy Solution Div, Environmental Affairs Dept., Purchasing Dept. , Health Insurance & Employees' Welfare Sect., Personnel Dept., Internal Audit Dept., Audit & Supervisory Board Member's Office, Compliance Dept., Regional Development Div., Finance Dept, TGES, TOKYO GAS COMMUNICATIONS, INC.