Managing Stores to Save Energy

Reduction of per-Store Electricity Consumption by 20% by Fiscal 2020
(compared to the fiscal 2010 level).

A freezer and refrigeration system using CO2 coolant
This system has better effects for preventing global warming compared with CFC equipment as well as higher energy-saving effects.

Lawson works to reduce electricity consumption at the stores to reduce their environmental impact. Setting "Toward a 20% reduction in electricity consumption per-store compared to the fiscal 2010" as its medium-term energy saving target for fiscal 2020, Lawson is proactively introducing energy-saving refrigeration and air-conditioning equipment as well as LED lighting in its store facilities.

per-Store Electricity Consumption (Index) and CO2 Emissions*1

Notes : 

CO2 emissions derived using adjusted coefficients for receiving-end terminals published by the Federation of Electric Power Companies of Japan for fiscal 2010.
The figures for fiscal 2018 and 2020 are estimates based on utility supplier-specific emission coefficients for fiscal 2019.
Calculated for April 1 to March 31 to coincide with the administrative fiscal year.

Initiatives at Environment-Friendly Model Stores

Lawson opens environment-friendly model stores throughout Japan into which different types of eco-friendly facilities are introduced. Effective types of cutting-edge equipment are installed in other stores after their effects in terms of renewable energy use and performance are verified.

LAWSON Tatebayashi Kido-cho Store
(Tatebayashi City, Gunma Prefecture)

In an open environment-friendly model store in January 2018, "LAWSON Tatebayashi Kido-cho Store", conducted a variety of energy-creating and energy-saving measures.

CLT(Cross Laminated Timber)
CLT(Cross Laminated Timber)

The CLT is wooden construction material. It is made of several layers of dimension lumber oriented at right angles to each other and glued to create structural panels with exceptional strength and good thermal insulation properties. Using the CLT for store structure and interior to improve heat insulation capacity reduces burden of air conditioning equipment.

Ultra Eco-Ice(thermal storage tank for refrigeration)
Ultra Eco-Ice(thermal storage tank for refrigeration)

The store is equipped with the Ultra Eco-Ice system which drives coolers to generate ice and store thermal energy during nighttime in lower ambient temperatures and cools refrigeration display cases during daytime by using the energy in higher ambient temperatures, aiming effective driving to save energy.

Activities of eco-friendly model store(an example)

First convenience store Five-star & ZEB ratings

The LAWSON Kodaira Tenjin-cho 2-chome Store, an eco-friendly model store, acquired a five-star rating, the highest in the Building Energy-efficiency Labeling System (BELS), which evaluates the energy-saving performance of buildings on a five-level scale. The store also achieved “net Zero Energy Building” (ZEB), the highest of the three levels (ZEB, Nearly ZEB, and ZEB Ready) in the energy rating system for buildings. If a building has achieved net zero primary energy consumption (energy used for air-conditioning, ventilation, lighting, hot water, etc.) through the use of renewable energy, installation of highly energyefficient equipment etc., the building is given a ZEB rating.

First convenience store IoT-based energy saving support system

The system sends notifications to a tablet installed at the store to carry out daily “energy savings.” It also sends the tablet notifications to carry out “energy saving” (or “energy creation”) during peak energy consumption periods to ensure a stable power supply. Upon confirming the notifications, store equipment (refrigerators, air conditioner, lighting equipment, etc.) equipped with IoT technology in the store automatically saves (or creates) energy. This is the first initiative of its kind to receive approval from the Ministry of Economy, Trade and Industry as a Virtual Power Plant Test Project in the convenience store industry.

Pursuing Innovation toward Eco-Friendly Stores

Since August 2008, Lawson has been opening eco-friendly model stores that use natural energy such as natural light, wind and geothermal energy. Facilities that are found to offer excellent energy-saving effects are then introduced to existing stores for further energy conservation and reduction of CO2. The findings obtained through these efforts have yielded such fruits as solar-power systems, LED lighting and freezer and refrigeration systems using natural (CO2) coolants.

List of Eco-Friendly Stores

Active introduction of freezing and refrigeration systems using CO2 coolant

In fiscal 2010, Lawson began installing CFC-free (CO2 coolant) freezing and refrigeration systems that have high energy-saving effects. The total number of stores with the systems reached about 3,400 as of February 28, 2019. The impact of CO2 coolant on Earth’s atmosphere is very small, just 1/4,000 that of CFC coolants, greatly reducing greenhouse gas emissions. CO2 coolant is also highly energy efficient, reducing the electricity consumption in all stores by 12%.

Solar Power Systems

Solar panels equivalent to 22 kW installed at the Kodaira Tenjin-cho 2-chome Store (excelling the usual 12 kW)

Lawson is installing solar power generation systems as part of efforts to promote the use of renewable energy sources.

Lawson’s systems have a generating capacity of 12 kW, comprising 10 kW (two 5 kW devices) for power sales and 2 kW for in-store use. With these systems, one store generates about 11,000 kWh per year, meaning that 2,000 stores generate an annual total of 22 million kWh, enough to supply about 6,100 households in Japan, which use an average of 3,600 kWh annually.

Participation in a Photovoltaic Power Generation Business through a Citizens' Fund

Solar panels installed on the roof
of the Iida Dashina Store

Lawson is involved in a photovoltaic power generation business called the South Shinshu Ohisama Power Station Installation Project under the auspices of a citizens’ fund, the Global Warming Prevention Ohisama Fund. Power generated by solar panels installed on the rooftops of two LAWSON stores in Iida City, Nagano Prefecture, by the citizens’ fund with a subsidy from the Ministry of the Environment is purchased by the stores for their internal consumption. The panels on the Iida Dashina Store generate approximately 5,000 kWh of power, while the Iida Zakoji Store’s panels generate approximately 9,500 kWh. Power generation by this business is approved/authorized by the Green Energy Certification Center, and the “Environmental Value” of the generated power is represented as Renewable Energy Certificates*.

* Renewable Energy Certificate: The environmental value of power generated using sunlight, wind power, and other natural energy sources is recognized in the form of tradable certificates.