The hypothesis that the product of discharge and concentration of nitrogen (N) in river water is equal to the atmospheric deposition was verified in the mountainous basin of the Tedori River in Japan. To verify this relationship, long-term data are required to eliminate the effect of short-term variation of the N components. The basin has very high mountains, including Mount Hakusan (2702 maltitude), which is covered with deep snow in winter. Therefore, limited data were used for the estimation of the deposition of the entire basin by assuming a linear relationship of altitude. As a result, it was found that the estimated N concentration coincided well with observed concentrations at six sites—the Shiramine and Kuwajima (upper stream), Nakajima (lower stream) and Dainichi dam, Tedori dam and Senami sites (middle stream). The seasonal variation of N concentrations was low in the snowmelt period and high in autumn through to winter. This was not due to the larger discharge in snowmelt season as it was also found that N deposition was high in winter and low in spring, which indicated a clear relationship between N concentration and monthly atmospheric deposition including N storage in snow pack.
 G. Iwatubo, N. Tokuch and Y. Nakagawa, “Rain and Forest Runoff-Water Chemistry, The 30 Years Change in the Amount of Dissolved Elements in Rain Water, Input and Output Budget of Elements in Rain and Runoff Water, and the Extensive Regional Change of Runoff Water Chemistry,” Japanese Journal of Environmental Toxicology, Vol. 39, No. 2, 1997, pp. 63-71.
 F. Noto, T. Maruyama, Y. Hayase, H. Takimoeo and K. Nakamura, “An Evaluation of Snow Storage Depth in the Tedori River Basin Using Tank Model, Trans.” Japan Society Irrigation and Drainage Engineering, Vol. 268, 2010, pp. 31-37.
 F. Noto, T. Maruyama, H. Takimoto, K. Nakamura and T. Onishi, “Evaluation of Water Resources by Snow Storage Using Tank Model in the Tedori River Basin in Japan,” Paddy and Water Environment, Vol. 11, No. 1-4, 2011, pp. 113-121.
 T. Maruyama, I. Hashimoto, K. Murashima, H. Takimoto and D. Nakade, “Assessment for Nitrogen Pollution Loads from Farmland, Japan, by Objective Yield and Standard Fertilizer Usage,” Paddy and Water Environment, Vol. 7, No. 2, 2009, pp. 151-159. doi:10.1007/s10333-009-0157-y
 T. Maruyama, F. Noto, K. Murashima, I. Hashimoto and K. Kitada, “Analysis of the Nitrogen Pollution Lord Potential from Farmland in the Tedori River Alluvial Fan Areas in Japan,” Paddy and Water Environment, Vol. 8, No. 3, 2010, pp. 293-300. doi:10.1007/s10333-010-0202-x
 T. Maruyama, H. Takimoto, I. Hashimoto, D. Nakade and K. Murashima, “Evaluation of Nitrogen Load Potential from Agricultural Land. By Objective Yield and Standard Fertilizer Usage Association of Upland Agriculture Promotion of Japan,” Upland Agriculture, Vol. 615, 2010, pp. 1-11.
 T. Maruyam, F. Noto, K. Murashima, I. Hashimoto and K. Kitada, “Analysis of the Nitrogen Pollution Load Potential from Farmland on the Tedori River Alluvial Fan Areas,” Paddy and Water Environment, Vol. 8, No. 3, 2010, pp. 293-300. doi:10.1007/s10333-010-0202-x
 T. Maruyama, F. Noto, T. Takahashi, T. Tsuchihara and T. Tanaka, “Analysis of Nitrogen Pollution Load by Domestic Waste Water Treatment in the Tedori River Alluvial Fan Areas, Trans.” Japan Society Irrigation and Drainage Engineering, Vol. 269, 2010, pp. 113-119.
 T. Maruyama, F. Noto, T. Takahashi, K. Nakamura and T. Onishi, “Assessment of Environmental Nitrogen Pollution Load Potential from Sewage Treatment Water in the Tedori River Alluvial Fan Area, Japan,” Paddy and Water Environment, Vol. 9, No. 2, 2011, pp. 267-274. doi:10.1007/s10333-010-0248-9
 Ministry of Agriculture, Forestry and Fishery, “Investigation on Rice Consume,” 2012. http://www.maff.go.jp/j/press/shokusan/keikaku/080522.html
 Ministry of Agriculture, Forestry and Fishery, Feed Situation, “Domestic Animal Division and Food Safety Management Division,” 2012. http://www.maff.go.jp/j/chikusann/sinko/l-siryo/pdf/1205meguru.pdf
 M. J. Mitchell, G. Iwatubo, R. Ohrui and Y. Nakagawa, “Nitrogen Saturation in Japanese Forest: An Evaluation,” Forest Ecology and Management, Vol. 97, No. 1, 1977, pp. 39-51. doi:10.1016/S0378-1127(97)00047-9