One of my main international conference, 12^th International Conference on Ecohydraulics will be held in Tokyo (August 19-24, 2018).  This symposium is a joint symposium convened by the International Association for Hydro-Environment Engineering and Research (IAHR) and International Society for River Science (ISRS).  As a local organizing committee member, we are making our best effort to make this conference attractive and fruitful.