The scale of the market is increasing, and it is expected to be 400 million tonnes of C02 worldwide in 2010 (Takeda, 2009). Furthermore, in March 2008, the Commission for Certification Criteria for VER Using Carbon Offsetting was established. This body considered system design issues of VER and third-party verification, and in November 2008 released the “Implementation Rules for Offsetting and Carbon Credit (J-VER)”.