For use in the Carbon Footprint of Products Pilot Project (CFP Pilot Project), the tentative Database of GHG Emission Factors for the CFP Pilot Project has been released. This tentative database was created under the supervision of the National Institute of Advanced Industrial Science and Technology (AIST) and verified by the GHG Emission Factors Review Committee (Chairperson: Prof. Emeritus Hisashi Ishitani). This committee consists of third-party intellectuals. The database was developed by collecting and arranging data from various sources such as documents and research materials to support the CFP Pilot Project in FY 2009. A new database which provides more detailed and exhaustive GHG emission factors is under construction. This new database is aiming to cover 1,500 or more items and will be released at the end of FY 2009.

The values may differ between this tentative database and the database under construction. Since the data gives only the results of assessment under fixed conditions, it is not appropriate to make a simple comparison between materials by the numeric values. 

The detailed information of the database is available here (in Japanese.)