矢 作 川 環 境 技 術 研 究 会（やはぎがわかんきょうぎじゅつけんきゅうかい）、矢環研（やかんけん）
The Yahagi River Association on Environmental Technology
"Research and field practice" of environmental technologies for conservation and management of water quality in river basin（including water use area and its bay area）by Yahagi River method，partnership activities．