Energy Conservation Law
The Energy Conservation Law, enacted in Japan in 1979 and updated several times, is an important part of the country’s energy optimization strategy. The law aims to improve energy efficiency in the industrial, transportation, and building sectors, while contributing to reducing greenhouse gas emissions and promoting sustainable development.
Key provisions of the Energy Conservation Law:
Energy Performance Standards for Buildings
- The law requires new buildings, including both residential and commercial, to meet strict energy performance standards. This includes insulation, the use of insulating glass, and architectural design that minimizes energy loss.
- Buildings must use advanced energy management technologies, such as more efficient HVAC (heating, ventilation, and air conditioning) systems.
- Older buildings must also be retrofitted to meet these standards through improved insulation and energy efficiency.
In Japan’s CASBEE (Comprehensive Assessment System for Built Environment Efficiency), buildings are ranked according to their energy efficiency, with ratings ranging from A to C, and up to the highest level of S. The grades are based on energy efficiency as well as overall environmental criteria.
Comparison to LEED:
Buildings that meet LEED Platinum (the highest standards) can achieve 50% lower energy consumption than standard buildings, typically around 80-100 kWh/m²/year, while LEED Silver or Certified levels can be around 120-160 kWh/m²/year.
However, the exact numbers depend on the type of building, geographic location, and rating system used (such as CASBEE or LEED).
Developing Zero Energy Buildings (ZEB) and Zero Energy Houses (ZEH)
- One component of the Energy Conservation Law is to promote the construction of ZEBs and ZEHs. These buildings are designed to consume as little energy as possible, with the goal of achieving Net Zero energy consumption through technologies such as solar panels and efficient air conditioning systems.
- Japan has set a vision and ambitious goal of achieving Zero Energy Building (ZEB) standards for all public buildings by 2030. This demonstrates the Japanese government’s strong commitment to reducing carbon emissions and saving energy, aiming for Net Zero by 2050.
Incentives and Sanctions
Incentives:
Subsidies
Subsidies for energy efficiency improvements: The Japanese government provides direct subsidies to businesses that improve their infrastructure and energy-saving technologies. Businesses can receive subsidies of up to 50% of the investment costs for green energy projects such as upgrading HVAC systems, installing solar panels, or insulating
Financing programs: In addition to subsidies, the government also offers low-interest loan programs to encourage investment in energy-saving and environmental protection solutions. These loans can amount to millions of yen, depending on the size and type of project.
Tax incentives
Investment tax incentives: Businesses investing in energy-efficient technologies and solutions can enjoy tax reductions of up to 10-20% of their investment costs, especially in the renewable energy and green building sectors.
Corporate income tax exemption: Companies with large projects related to renewable energy or energy efficiency can be exempted from corporate income tax for a number of years, usually 1-3 years, to reduce operating costs and encourage the adoption of green technology.
Incentive programs
Companies with outstanding achievements in energy efficiency will be rewarded by the government and professional organizations, to encourage green efforts and motivate other businesses.
Sanctions
Regulated emission levels:
Reducing CO2 emissions in buildings:
New buildings must comply with strict standards for energy efficiency and CO2 emission reduction. Maximum emissions depend on the type of building, but typically require at least a 30-40% reduction compared to conventional buildings that do not comply with these standards.
Industrial Sector:
Heavy industry (such as steel and cement production) and large manufacturing plants must implement measures to reduce emissions by at least 10-15% within 5-10 years, depending on the specific industry and scale of production.
Regulations require businesses to report energy consumption and emissions annually, and develop specific plans to reduce emissions gradually over the years.
Zero Emission Buildings (ZEB):
For ZEB buildings, the goal is to reduce CO2 emissions from energy operations by up to 100% through the use of energy-saving technologies and renewable energy.
Penalty frequency
Regular inspections: Businesses and organizations must report their energy consumption to regulatory authorities annually. If they violate energy conservation or CO2 emissions standards, they will be subject to further inspections and may be fined immediately if they fail to meet the requirements.
First-time fine: If a business violates for the first time, they will receive a warning and have the opportunity to correct it within a certain period of time. If they fail to correct it, they will be fined.
Repeat violations: In cases where a business violates repeatedly or fails to take corrective measures after a warning, they will be subject to higher fines and may have to close down the operation related to the violation.
Penalties:
Fines: Businesses that violate energy conservation standards can be fined up to 1 million yen (about $7,500) for serious violations.
Mandatory renovation penalties: If a business fails to comply after a warning or fine, the government may require mandatory renovations to comply with energy conservation standards. This can be costly for the business.
Administrative penalties: Businesses that repeatedly violate or fail to submit energy reports may face additional administrative measures, including temporary suspension of operations or revocation of tax incentives.
Repeat violations:
If a business has been fined but continues to violate, it may face increasing penalties with each inspection. The government has the right to carry out unannounced inspections to ensure businesses are complying
Revocation of subsidies: If a business has received a subsidy from the government but is later found to be in violation, they may have the entire subsidy revoked.
Results
After the promulgation and continuous updating of the Japanese Energy Conservation Law, many positive results have been recorded by the end of 2023
Reduction of energy consumption in buildings and industry
In the construction sector, the energy consumption of new buildings has been reduced by about 20-40% thanks to compliance with energy saving standards, especially in buildings that meet the ZEB (Zero Energy Building) standard.
Japanese industrial sector, especially large manufacturing plants, has recorded energy savings of 15-25% thanks to the application of advanced regulations and technologies.
Reduction of CO2 emissions
Total CO2 emissions from construction works have been reduced by about 10-12% compared to 2010, contributing to the target of reducing emissions by 50% by 2030.
ZEB buildings play an important role in reducing CO2 emissions by using renewable energy and energy-saving technology.
Number of buildings with green certification
LEED: Japan has 219 buildings with LEED (Leadership in Energy and Environmental Design) certification (As of October 2, 2024), mainly concentrated in large urban areas such as Tokyo and Osaka – According to USGBC.
Encouragement of renewable energy
Many industrial plants have achieved energy consumption reductions of 15-30%, thanks to the application of new technology and process solutions. Some industries such as steel and chemicals are reported to have significantly reduced energy consumption over the past decade.
According to statistics, more than 70% of large industrial production facilities in Japan have implemented energy-saving measures as required by the government.
These figures show the clear effectiveness of implementing the Energy Conservation Act, helping Japan move towards its Net Zero goal by 2050 and contributing to improving energy efficiency in many areas.