YANMAR TOKYO has achieved carbon neutrality


We will leave this world better than we found it

Yanmar is promoting the activities of YANMAR GREEN CHALLENGE 2050 with the aim of realizing A SUSTAINABLE FUTURE.
At YANMAR TOKYO we have achieved carbon neutrality with a total energy solution in a concept building.
We aim to create a society where the next generation can live in abundance.

We aim to create a society where the next generation can live in abundance.

Roadmap for achieving ZERO CO2

YANMAR TOKYO aims to reduce CO2 emissions to zero by implementing carbon offset initiatives such as CO2 reduction through energy saving and procurement of green power and carbon-neutral LNG.

STEP1Constructive efforts

・Low-E double glazing
・Rooftop gardening
・Eco louvers

STEP2Use of equipment

・CO2 controls
・Outside air cooling
・Water supply by large temperature difference
・High efficiency LED
・Dimming controls

STEP3Energy-conserving operation

・Cogeneration Systems + GeneLink
・High efficiency GHP
・Pneumatic radiant air conditioning
・Natural ventilation

・Solar power, Wind power
・Task ambient lighting
・EMS(Energy Management System)

STEP4Technological innovation

・Higher efficiency cogeneration and GHP
・Higher efficiency lighting, fans and pumps
・Thin client transition
・Decrease in staff density due to lifestyle changes

[Calculation conditions]
· Target area: Office areas
· CO2 emission coefficient: commercial power 0.555kg-CO2/kWh, city gas 2.277kg-CO2/kWh (Yanmar head office building standard)
*As of February 2021 -> 0.441kg-CO2/kWh, city gas 2.19kg-CO2/kWh

Becoming carbon neutral through total energy solutions

Conserving electricity with energy-efficient Yanmar equipment

The gas engine co-generation system, Genelink

Installed 420kW gas engine co-generation system The system generates electricity using utility gas as fuel, and achieves the world’s top-class power generation efficiency rate (42.6%) in the 400kW category output range. Waste heat from the engine during power generation is effectively utilized, injecting hot water into the Genelink system to be used for such purposes as heating and cooling offices and living space. This cuts down on energy use and CO2 emissions.

The installation of energy-efficient Yanmar equipment

GHP (Gas-Engine Heat Pump), GHP Chiller

28 units of gas heat pump air conditioners (GHP) (outdoor units of air conditioners) are installed on the roof, and 9 units are installed on the seismic isolation layer between the 2nd and 3rd floors to air-condition the entire floor.
Because city gas is used as fuel, it is possible to operate with less than one-tenth of the power consumption compared to ordinary electric air conditioners.

Power generation from renewable energy, especially from the sun and wind

Solar power and Wind power

Two types of renewable energy power generation facilities using natural energy are installed on the roof. A 1kW small wind power generator that uses a vertical axis wind turbine produces less noise and vibration than a propeller type, and can efficiently convert even light winds into rotational energy. In addition, the 10kW solar panels installed on the walls of the building can effectively generate power even in urban buildings with limited rooftop space.

Energy saving for buildings, using Low-E glass, living walls, natural ventilation and more

Low-e double glazing etc.

About 750m2 of living wall and rooftop greening have been incorporated. This contributes to improving amenities for users, restoring local ecosystems, and absorbing air pollutants. In addition, various energy-saving measures have been adopted, such as the use of low-e double glazing to soften the heat in summer and improve heating efficiency in winter.

The procurement of green power and carbon-neutral LNG

Green power andCarbon-neutral LNG

By using green power generated from renewable energy using nature such as solar power, wind power, and biomass, and carbon neutral gas with essentially zero emissions through activities to increase the absorption of greenhouse gases generated in the process from extraction to combustion of natural gas, we have realized an essentially 0% CO2 generation rate.

System flow
A cogeneration system (CGS) is a system that burns heavy oil or gas as fuel to generate electricity, and also effectively utilizes the heat generated at that time for purposes such as air conditioning and hot water supply.
During the interim period, a high waste heat utilization rate was achieved throughout the year through the use of waste heat in the natural ventilation promotion coil unit and the Rankine cycle generator (plans to install in the future).
Electricity and heat flow in a cogeneration system (CGS)

Carbon offset initiatives

What is carbon offset?

Carbon offset compensates for all or part of the amount of greenhouse gases such as carbon dioxid to be reduced as much as possible, then the gases that cannot be reduced even if we make efforts to do so, through afforestation, forest protection, clean energy business operations (purchase of emission rights), etc.
YANMAR TOKYO is working on carbon offset through purchasing green electricity etc.

CO2 is generated through daily activities.

Constructive efforts and CO2 reduction through cogeneration, high-efficiency GHP, etc.

Offsetting CO2 that cannot be reduced.

Main activities

Green energy
We procure clean electricity from 100% renewable energy, including environmental value. (Carbon offset targets)
Carbon neutral gas
Carbon offset is achieved by offsetting the greenhouse gases generated in the process from extracting to burning natural gas with the credits generated from activities such as forest conservation and afforestation.