 Japan Geoscience Union Meeting 2018Isotope Hydrology 2018The purpose of the session is to review the present state of knowledge of isotope hydrology, by bringing together hydrologists, geologists, volcanologists, geochemists, agronomists, ecologists, engineers and so on.AHW25-04 Analysis of hot spring water formation in Yamanashi, JapanYoshiki Hashimoto1, Takashi Nakamura1, Yuki Yoneyama, Futaba Kazama1, Kei Nishida1 1.University of Yamanashi 