A senior researcher and deputy head of Rural Engineering Department of ITC, Dr. Oeurng Chantha spent almost two weeks (01-10 September 2016) at Japan for the the Visiting Professor program arranged by Hokkaido University. On this special occasion, Dr. Oeurng gave special lecture on Integrated Watershed Management for 3S rivers case (Sekong, Sesan & Srepok) of the Mekong Basin to the international class of master students coming from several countries such as Thailand, Indonesia, Bhutan, Nepal, China, and Cambodia. The lectures coverage both technical and social aspects which illustrated a good example, exact methods and applicable strategic that can be use to manage river basin not only just for Mekong River but also for other river tributaries. Beside in class activities, Dr. Oeurng was also invited to visit some rural infrastructures in surrounding Hokkaido Island such as spillway, canals and drainage system.