The Asia Pacific Regional Workshop on Biomass Energy Resource Assessment was jointly organized by the Asia and Pacific Centre for the Transfer of Technology (APCTT of the UNESCAP), the International Renewable Energy Agency (IRENA) along with the Ministry of Science and Technology of the Royal Thai Government in Bangkok, Thailand during 6-8 July 2015. The event brought together experts from internationally renowned renewable energy related organizations as well as key stakeholders from countries across the region. Professor Shabbir Gheewala was invited by IRENA to share his experiences on biomass energy assessment, in particular related to feedstock availability, greenhouse gas emissions and water resources. Several countries including Japan, New Zealand, Australia, China, Indonesia, Nepal, Lao PDR, Malaysia, Pakistan, Iran, Sri Lanka and Fiji shared their experiences along with experts from the Food and Agriculture Organization of the United Nations (FAO), UN-APCTT-ESCAP and IRENA. The last day of the program was dedicated to a hands-on training conducted by FAO on “Tools & Databases on Biomass Resource Assessment”.