Quality specifications
The quality of fuels sold in Japan is regulated under the umbrella of the . Under the act, the Central Environment Council, under the Ministry of Environment, sets limits on fuel properties or sets the maximum quantity of substances in automotive fuels to keep vehicle exhaust emissions within the permissible range.
The Ministry of Economy, Trade and Industry (METI) issued an ordinance on the quality of gasoline and diesel to be used as fuel in automobiles based on the . This act stated that the specifications set by METI shall comply with those set by the Ministry of Environment.