... river water from an urban area in Japan and agricultural drains when agricultural chemicals are applied. In addition, analysis of agricultural chemicals by GC/MS was simultaneously carried out and ... R., Kameya T., Sawai A. and Urano K. (2007). Application of a larval medaka assay to evaluate the fish safety level in Sagami River, Japan, Environ. Monit. Assess., 130, 475-482. Ministry of ... Case Study of Agricultural Drains - Takashi KAMEYA*, Kotaro YAMAZAKI*, Takeshi KOBAYASHI* and Koichi FUJIE* * Faculty of Environment and Information Sciences, Yokohama National University,...