Research Clusters

Environmental Diagnosis on Earth Surface Systems

 Research Keyword: Hydrological cycle, Material cycle, Environmental conservation, Stable isotopes, Data science

The hydrological cycles and material transports involving the effects of climate changes and human impacts on the earth surface, an important aspect of environmental science and human life, has not yet been fully depicted. New recent observations performed in regional scales have revealed changes on the earth surface systems that should be more deeply investigated by a multidisciplinary approach in multiple spatiotemporal scales as providing important base for developing sustainable and well-being society. Our research group investigates these issues on near-surface environments including atmosphere, watershed, aquifers, and costal environments on regional to global scale, using various physicochemical parameters, isotopes, simulation tools, AI approaches and big data. Effects of natural disasters on earth systems including floods, earthquakes and volcanic eruptions are also major concerns of this research unit.

Environmental Diagnosis on Earth Surface Systems

Cluster members

  • Japan
    Takahiro HOSONO Website
    Professor, Faculty of Advanced Science and Technology, Kumamoto University
  • Germany
    Jens HARTMANN Website
    Professor, Institute for Geology, University of Hamburg/ IROAST Visiting Professor
  • Italy
    Research Associate, National Institute for Geology and Volcanology, University of Hamburg
  • Italy
    Marino Domenico BARBERIO
    Researcher, National Institute of Geophysics and Volcanology
  • Japan
    Associate Professor, Faculty of Advanced Science and Technology, Kumamoto University
  • Japan
    Postdoctoral Researcher, Faculty of Advanced Science and Technology, Kumamoto University



Maruyama, R., Yasumoto, K., Mizusawa, N., Iijima, M., Yasumoto-Hirose, M., Iguchi, A., Hermawan, O.R., Hosono, T., Takada, R., Song, K.-H., Shinjo, R., Watabe, S., Yasumoto, J., 2024. Metagenomic analysis of the microbial communities and associated network of nitrogen metabolism genes in the Ryukyu limestone aquifer. Scientific Reports 14, 4356.

Hermawan, O.R., Hosono, T., Yasumoto, J., Yasumoto, K., Song, K.-H., Maruyama, R., Iijima, M., Yasumoto-Hirose, M., Takada, R., Hijikawa, K., Shinjo, R., 2024. Mechanism of denitrification in subsurface-dammed Ryukyu limestone. Science of the Total Environment 912, 169457.

Hosono, T., Taniguchi, K., Rahman, A.T.M.S., Yamamoto, T., Takayama, K., Yu, Z.-Q., Aihara, T., Ikehara, T., Amano, H., Tanimizu, M., Nakagawa, K., 2023. Stable N and O isotopic indicators coupled with social data analysis revealed long-term shift in the cause of groundwater nitrate pollution: insights into future water resource management. Ecological Indicators, 154, 110670.

Hermawan, O.R., Hosono, T., Yasumoto, J., Yasumoto, K., Song, K.-H., Maruyama, R., Iijima, M., Yasumoto-Hirose, M., Takada, R., Hijikawa, K., Shinjo, R., 2023. Effective use of farmland soil samples for N and O isotopic source fingerprinting of groundwater nitrate contamination in the subsurface dammed limestone aquifer, Southern Okinawa Island, Japan. Journal of Hydrology, 619, 129364.

Basak, A., Rahman, A.T.M.S., Das, J., Hosono, T., Kisi, O., 2022. Drought forecasting using the Prophet model in a semi-arid climate region of western India. Hydrological Sciences Journal, 67(9), 1397-1417.

Hosono, T., Nakashima, S., Tanoue, M., Ichiyanagi, K., 2022. Monsoon climate controls metal loading in global hotspot region of transboundary air pollution. Scientific Reports, 12, 11096.

Mizota, C., Hansen, R., Hosono, T., Okumura, A., Shinjo, R., Aizawa, M., 2022. Provenancing nineteenth century saltpetre from British India using nitrogen, oxygen, and strontium isotope ratios. Collections: A Journal for Museum and Archives Professionals, 18(2), 220-235.

Mizota, C., Hosono, T., Okumura, A., Yamanaka, T., 2023. Nitrogen cycling in western India as revealed by nitrogen isotopes and the historic production of saltpetre. Archaeometry, 65, 3, 635-652.

Rahman, A.T.M.S., Kono, Y., Hosono, T., 2022. Self-organizing map improves understanding on the hydrochemical processes in aquifer systems. Science of the Total Environment, 846, 157281.


JSPS Grant-in-Aid for Scientific Research A (22H00563), 2022-2025, Leader: Takahiro Hosono

JSPS Fostering Joint International Research A (19KK0291), 2020-2022 Leader: Takahiro Hosono


・Water sampling survey of 109 first class rivers in Japan

・March, 2024: Invitation of Visiting Professor Jens Hartmann to co-author a paper

・Overseas research stay in Dipartimento di Scienze della Terra, Università di Roma La Sapienza, Italy ( June 5th to October 3rd, 2022)
(Sampling of spring water)                                                   (Lecture in Sapienza Univ. of Rome)

・Water sampling survey of 23 major rivers in New Zealand

・Discussion with Prof. Jens Hartmann (Research Cluster member/IROAST Visiting Professor) in Kyoto  (October 14th to 16th, 2022)


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