AbstractUnder Kyoto Protocol Regime, no obligation is imposed on decreasing domestic Green House Gas (GHG) emission in the field of agriculture in Japan. Clean Development Mechanism(CDM), however, could make Japanese GHG reduction technology and capital be transferred to Asian countries, CER (Certified Emission Reduction) could be transferred to Japan and then farmers in Asian countries could get profit which fluctuate on the GHG prices, mainly influenced by global market..GHG emissions (CO2-equivalent) from poultry and swine industry in the ASEAN 8 countries (Viet Nam, Philippines, Indonesia, Thailand, Malaysia, Myanmar, Cambodia and Laos) increased by around 8% from 12.76 million tons/year to 13.82 million tons/year during 1997-2002. Around 10% of GHG from poultry and swine farming in the 8 countries was emitted from enteric fermentation and the residual 90% was emitted from manure management during 1997-2002. Reduction scenario on GHG from swine farm was made by conversion of liquid/slurry system into drylot one, in the adoption of manure management technology into broiler farm with the thermal drying of broiler manure. GHG reduction from poultry and swine industry in the 8 countries could be supposed to be around 10% with the adoption of this reduction scenario. GHG from poultry and swine industry in this region converted in accordance with Dec 08 contracts at ECX. Financial size that developing countries could expect as economic benefit depends on the project size of Clean Developing Mechanism (CDM) to each farming system in this region. CDM depends on the fluctuation of GHG price mainly on the benchmark in Europe.