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River in Miyazaki prefecture, Japan
The Iwase River is a natural freshwater river located in Miyazaki prefecture in Kagoshima, Japan. The watershed of the river is popular for the presence of numerous springs and waterfalls. The river flows into the Oyodo River, which in turn flows to the Pacific Ocean.
References
Kato, Masahiro (2008). "A taxonomic study of Podostemaceae of Japan". Bulletin of the National Museum of Nature and Science, Series B. 34: 63–73.
FUJIWARA, Hideshi; SUGIO, Satoru (2001). LANDSCAPE RESTORATION OF WATERFALL AND PROTECTION OF AQUATIC PLANT KAWAGOROMO. Proceedings of the Symposium on Global Environment. Vol. 9. Japan Society of Civil Engineers. pp. 45–50.