Hiyoshi Co., Ltd. provides total support for environmental businesses in a wide range of fields, from analysis and measurement to industrial chemicals , facility management , and environmental conservation. List RSS feed registration 2014/12/15 Notice of year-end and New Year holidays 2014/11/13 Announcement of our president's lecture "Ryukoku University Intellectual Property Seminar" 2014/10/24 Open lecture to think about H26 sick house problem 2014/09/09 Presented at the 17th Japan Society for Water Environment Symposium 2014/09/01 Presented at the Genetics Society of Japan 2014/08/31 We will exhibit at Biwako Environmental Business Messe 2014 2014/08/29 Adopted JICA grassroots technical cooperation project 2014/08/15 Poster presentation at the Environmental Technology Society