Ministry of Economy, Trade and Industry
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Agency for Natural Resources and EnergyAdditional Designation of Building Materials Subject to the Top Runner Program under the Energy Saving Act

On November 25, 2014, the Cabinet decided to enforce the Cabinet Order for Partial Revision of the Order for Enforcement of the Act on the Rational Use of Energy (hereinafter referred to as the “Energy Saving Act”).

The revision aims to additionally define windows (sash windows and multiple-layered glass) as building materials to prevent heat loss in buildings that are particularly necessary to improve the rational use of energy, pursuant to the provision of Article 81 (3) of the Energy Saving Act.

1. Details of the revision

Addition of building materials to prevent heat loss in buildings subject to the Top Runner Program* (Articles 23 (2) and 23 (3) of the Order for Enforcement):

  • The revised provision additionally defines windows (sash windows and multiple-layered glass) as building materials to prevent heat loss in buildings that are particularly necessary to improve the rational use of energy, pursuant to the provision of Article 81 (3) of the Energy Saving Act (called “building materials subject to the Top Runner Program”).
  • Manufacturers and other entities of top-runner building materials that are subject to recommendations and orders under the Energy Saving Act should satisfy the requirement that they manufacture or import at least 94,000 sash windows or at least 110,000 m2 of multiple-layered glass.

*Reference:
The Top Runner Program is a framework under which manufacturers and other entities are required to satisfy the criteria for the energy-saving performance regarding their products within the target fiscal years (within 3 to 10 years) which have been set based on the performance of the products with the highest energy consumption efficiency (top runner performance) at present.

2. Future schedule

Promulgation: Friday, November 28, 2014
Enforcement: Sunday, November 30, 2014

Release date

November 25, 2014

Division in charge

Energy Efficiency and Conservation Division, Energy Conservation and Renewable Energy Department, Agency for Natural Resources and Energy

Ministry of Economy, Trade and Industry
1-3-1 Kasumigaseki, Chiyoda-ku, Tokyo 100-8901, Japan Tel: +81-(0)3-3501-1511
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