Japan: River near Mt Tanzawa

Tanzawa mountains (丹沢山地) are mountain range in the Kantō region, in Japan. It covers the northwestern part of Kanagawa Prefecture and touches the prefectural borders of Shizuoka Prefecture to the west and the Yamanashi Prefecture to the north.Climbers come from various parts of Japan, but there have been a growing number of international climbers. The mountain range offers numerous moderate to strenuous trails for hikers. The most popular peaksamong climbers are Mount Tō (塔ノ岳) and Mount Ōyama (大山) which are located in the eastern part of the Mountains, mainly due to their easier transportation access from Yabitsu Pass. However, the tallest mountain in these mountains is Mount Hiru, which is 1,673 metres (5,489 ft). In comparison, Mount Tō is 1,491m (4,891ft) high and Mount Ōyama is 1,252 metres (4,108 ft) high. The western part is less often visited, but offers the opportunity of river trekking or sawanobori (a form of mountaineering).Ref: http://en.wikipedia.org/wiki/Tanzawa