This study handles some Japanese political processes from an adoption of the Kyoto Protocol (the KP) at December 1997 to a ratification of the KP at June 2002. After adoption of the KP there were confrontations among ministries, industries and NGOs, how to achieve the reduction target which Japanese government agreed by an adoption of the KP, especially about building additional 21 nuclear power plants until 2010. At March in 2001 Busch-US government proclaimed that USA refuses the ratification of the KP. On this situation Japanese industry sector, many ministries and government parties resisted to ratify the KP keenly. Prime Minister Mr. Koizumi had not changed his line to ratify the KP stubbornly. After hard coordination among political parties, ministries and industries he declared a policy to ratify the KP in Diet speech at February 2002 and the KP was ratified at June 2002.