Understanding MM21 DHC in 1 minute

Company Profile

Minato Mirai 21 District Heating and Cooling (MM21 DHC) Co., Ltd. is an enterprise that supports the Minato Mirai 21 district with a high-efficiency district heating and cooling (DHC) system.
As our corporate philosophy states, “We contribute to enhancing urban value through the supply of energy.” By providing a DHC, we are working to improve the district’s environmental performance while delivering a stable supply of thermal energy.

Basic Data

Date established October 30, 1986
Capital ¥3 billion
Number of employees 67 (as of June 2024)
President and Representative Director Eriko Yakushiji
Net sales ¥11.23 billion (fiscal year ended March 31, 2024)
Headquarters 1-45, Sakuragicho 1-chome, Naka-ku, Yokohama, Kanagawa 231-0062, Japan
Start of supply (1989) Today (April 2024)
Floor area served 7,155 sqm 4,546,670 sqm
Number of households served 1 68

Japan’s Largest

Total floor area served by MM21 DHC is 4.24 million sqm. This is the largest single DHC area out of 136 DHC areas across Japan (as of March 2023).
Since DHC operations began in 1989, MM21 DHC has grown along with the development of the Minato Mirai 21 district.

High Efficiency

As the district grew, MM21 DHC introduced state-of-the-art equipment to boost efficiency. Through coordination among plants, priority was given to use of the latest equipment throughout the district, enabling the DHC to improve energy coefficient of performance (COP) and reduce CO2 emission intensity.

吸収冷凍機
プラントエネルギー効率 プラントエネルギー効率
安定供給

Stable Energy Supply

Operators thoroughly versed in the running of heat-source equipment are stationed at the DHC’s two plants round the clock, 365 days a year. These technicians conduct detailed inspection and maintenance daily, preventing obstruction of energy supply.

Decarbonization

In close consultation with residents, the City of Yokohama and Yokohama Minato Mirai 21 Co., Ltd. (YMM) are leading the construction of a decarbonization model for large urban areas.
MM21 DHC is contributing to the decarbonization of Minato Mirai through a wide range of measures, aiming to achieve zero carbon emissions in the use of electricity to produce heat by 2030.