（Last updated : 2024-01-26 17:12:22）
  MASAYA YASUHARA
   Department   Department of Environment Systems, Faculty of Geo-Environmental Science
   Position   Professor
■ Present specialized field
Environmental dynamic analysis, Atmospheric and hydrospheric sciences 
■ Book and thesis
1. Article Microbial methane production and oxidation in the Holocene mud beneath the Kanto Plain of central Japan Geochemical Journal 54,pp.243-254 (Collaboration) 2020
2. Article Original composition and formation process of slab-derived deep brine from Kashio mineral spring in central Japan Earth, Planets and Space 72(107) (Collaboration) 2020
3. Article Widespread distribution of ascending fluids transporting mantle helium in the fore-arc region and their upwelling processes: Noble gas and major element composition of deep groundwater in the Kii Peninsula, southwest Japan Geochimica et Cosmochimica Acta 182,pp.173-196 (Collaboration) 2016
4. Article Geochemical Characterization of Groundwater in a Volcanic System Resources; Groundwater Quantity and Quality 4,pp.358-377 (Collaboration) 2015
5. Article Occurrence of old groundwater in a volcanic island on a continental shelf; an example from Nakano-shima Island, Oki-Dozen, Japan Journal of Hydrology 511,pp.295-309 (Collaboration) 2014
6. Article Rapid alkalization in Lake Inawashiro, Fukushima, Japan: implications for future changes in the carbonate system of terrestrial waters Aquatic Geochemistry 19,pp.281-302 (Collaboration) 2013
7. Article Passive degassing of magmatic volatiles from Iwate volcano, NE Japan, based on three-dimensional measurement of helium isotopes in groundwater JOURNAL OF GEOPHYSICAL RESEARCH 117(B02204) (Collaboration) 2012
8. Article Biological and water chemistry controls on Sr/Ca, Ba/Ca, Mg/Ca and d18O profiles in freshwater pearl mussel Hyriopsis sp Palaeogeography, Palaeoclimatology, Palaeoecology 309(3-4),pp.298-308 (Collaboration) 2011
9. Article An estimate of local bomb-produced 36Cl fallout using the depth profile of　groundwater in the Tsukuba Upland, central Japan Hydrological Research Letters 2,pp.9-13 (Collaboration) 2008
10. Article Groundwater system compartmentalized by a tectonic zone in the Kanto plain, central Japan Proceedings of the International Symposium - Aquifers Systems Management -, Dijon, France, 216-220 pp.216-220 (Collaboration) 2006
Display all(12)
■ Book and thesis
1. Other Noble gas and major element composition of deep groundwater in the fore-arc region of southwest Japan; widespread distribution of fluids dehydrated from the Philippine Sea Plate 2017 JpGU Abstract (SIT26-P01) (Collaboration) 2017
2. Other Magmatic volatile flux into the groundwater system in and around Kutcharo caldera, east Hokkaido, Japan The 26th Goldschmidt Conference (Yokohama, Japan)  (Collaboration) 2016
3. Other Using multiple tracers to investigate groundwater system in mountains 2012 International Workshop of Groundwater Resources Technology in Mountainous Regions of Taiwan  (Single) 2012
4. Book Hydrogen and Oxygen Isotopes in Hydrology The Textbook for the 11th IHP Training Course in 2001 (UNESCO) (Chapter 7),pp.109-132 (Collaboration) 2002
■ Academic conference presentation
1. 2022/08 Itoh,Y., Yasuhara,M., Lee,S., Nakamura,T., Inamura,A., Asai,K.(2022.08): A Geochemical Study on Water Quality and Origins of Shallow Groundwater in Shinagawa, Central Tokyo, Japan (AOGS2022 19th Annual Meeting, HS08-A008)
■ Academic background
1. 〔Doctorial Course〕, University of Tsukuba, Completed,