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Tokyo Gas Group CSR Report 2016
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Social Report - Working with Local Communities
Safe and Secure Ways of Life and Urban Development

We will develop "smart energy networks" to contribute to the creation of low-carbon, disaster-resilient communities as we work to realize a sustainable society.

Promotion of Smart Networks Built around Cogeneration Systems

We are pursuing the development of "smart energy communities" that use energy smarter by connecting buildings in the community with a heat and electric power network. Communities can be made "energy smart" by building smart energy networks (SENs), which link supply and demand in a community into a single heat and power network based around a gas cogeneration system (CGS). Energy supply and demand throughout the network are optimized by an energy center, which precisely manages the network's heat and power use. By using such networks to provide low-carbon, disaster-resilient energy tailored to local characteristics, we will contribute to making communities both more environmentally friendly and resilient to disasters.

SEN development in the Toyosu wharf district

Tokyo Gas Group is pursuing urban development with the potential to last well into the 22nd century in a redevelopment area located around land the Group holds in the Toyosu wharf district of Tokyo's Koto-ku. This is a project called "Tokyo Smart City TOYOSU 22." Under this project, we are undertaking futuristic urban development guided by three conceptions of "smartness" - "smart energy," "smart green," and "smart community," from a long-term perspective looking beyond the Tokyo 2020 Olympics and Paralympics, which is a high-quality development to raise the value and appeal of the area.

TOYOSU 22 Urban Development Concept
TOYOSU 22 Urban Development Concept

In May 2016, we completed construction of a smart energy center in Zone 4 (see figure below), owned by Tokyo Gas Site Development Co., Ltd., in preparation for development of a SEN in the Toyosu wharf district. This is the second SEN to be developed by Tokyo Gas in an urban redevelopment district, the first being a SEN in the northern district adjacent to Tamachi Station's east exit. The newly completed smart energy center will be equipped with one of the world's most efficient gas cogeneration systems, which will supply electric power to the Toyosu wholesale market while waste heat is used by the center itself. Environmental friendliness will be enhanced by adopting gas pressure differential power generation using gas supply pressure. By giving the CGS blackout start functionality,✽1 laying independent power lines,✽2 and employing disaster-resistant medium-pressure gas pipelines, we will create a system that is capable of supplying uninterrupted heat and electricity even during power outages or other emergencies, thus enhancing the district's disaster resilience. The network will also have a "SENEMS"✽3 for centrally managing and controlling energy throughout the district using ICT. This will make it possible to optimally control heat sources and visually track energy usage, thereby contributing to greater environmental awareness among building users. We plan to progressively expand the heat and power network as development of Zones 4 and 2 progresses.

  • ✽1Capability to independently restart the generator during a power outage.
  • ✽2Power lines laid independently by an operator. They can be used at a customer's discretion when grid power has been interrupted.
  • ✽3Smart Energy Network Energy Management System.
Toyosu Wharf District Development Area
Toyosu Wharf District Development Area
Tokyo Gas's Toyosu Smart Energy Center
Tokyo Gas's Toyosu Smart Energy Center

Work started in Block II-2 (West area) in the northern district adjacent to Tamachi Station's east exit

Tokyo Gas Group is developing an SEN in the northern district adjacent to Tamachi Station's east exit (East area in Minato-ku, Tokyo) in partnership with the Minato ward authorities with the goal of reducing the area's carbon footprint and making it more disaster resilient. Supplies of heat and power have been progressively rolled out to three facilities - Minato Park Shibaura (a public facility), Aiiku Hospital, and a childcare support facility - since November 2014. The project is the first new urban development project in Japan to incorporate development of an SEN. In October 2015, work started on the TGMM Shibaura Project (provisional name) in Block II-2 (West area) in the northern district adjacent to Tamachi Station's east exit. This project will create a multipurpose business center on land owned by the company, and we plan to build a second smart energy center for the new center to be operated in tandem with the first as the district undergoes further development, thereby reducing CO2 emissions in the entire northern district adjacent to Tamachi Station's east exit by some 45% relative to 1990.

Key Advantages of SEN in the Northern District Adjacent to Tamachi Station East Exit
Linkages among multiple facilities with different purposes Public facility, hospital, etc.
Maximum adoption and effective use of renewables, untapped energy, etc. Use of solar heat and heat of underground tunnel water for air conditioning (first application in Japan for district heating)
Contribution to BCP Capable of uninterrupted power supply to disaster management base (Minato Park Shibaura) and uninterrupted heat supply to Aiiku Hospital during power outages
Optimal supply/demand control by SENEMS Optimization for area-wide heat and power according to outside air conditions and energy usage (first in Japan)
Smart Energy Network in the Northern District Adjacent to Tamachi Station's East Exit
Smart Energy Network in the Northern District Adjacent to Tamachi Station's East Exit
Participation in Yokohama's Tsunashima-Higashi Smart Town Project

Tokyo Gas Group is pursuing a number of projects, including development of an energy center, in Tsunashima Sustainable Smart Town, a next-generation urban smart city that is to be developed on the former site of a Panasonic factory in the Tsunashima-higashi district of Kohoku-ku in Yokohama, Kanagawa Prefecture, with energy supply scheduled to commence in phases beginning in December 2016. The plan is to develop energy supply systems based on an advanced model for sharing heat and power supplies to diverse facilities over a more compact area than in the past. We will improve supply continuity by installing a CGS in the town energy center and using multiple power sources and disaster-resistant medium-pressure gas lines, while the use of more efficient equipment and area-wide energy utilization will also improve environmental friendliness. And lastly, the delivery of energy services will ensure the financial viability of these improvements in supply stability and environmental friendliness.

Artist's impression of town energy center
Artist's impression of town energy center

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