Regarding bioenergy utilization in Japan, information on generation scale distribution of biomass resources is essential for development of a policy to introduce bioenergy. In this research, investigation based on various statistic resources was carried out first in Japan for the generation scale distribution of forest residues, manufacturer waste wood, cattle manure, construction waste wood, sewage sludge, night soil, house garbage, and waste food oil. As a result, it was found that the scale of the biomass generation in Japan is relatively small, usually being several tones per day in dry weight.
