1. Graduate School of Horticulture, Chiba University, Matsudo, Chiba, Japan
2. Department of Agriculture, Forestry and Fishery, Tateyama, Chiba, Japan
3. Kaneka Co, Osaka, Japan
4. JICA Uganda Office, Kampala, Uganda
5. Independent consultant, Oita, Japan
6. National Crops Resources Research Institute, Kampala, Uganda