Risk Evaluation and Disaster Mitigation Research Division
Inland Earthquake and Volcano Lab
Assistant Professor

Concurrent: Graduate School of Science
Research Subject(s)
I explore traces of past earthuake and tsunami (event deposit) based on field survey and geochemical analyses. My main interest is chronology of such event deposits. I am investigating a high-precison radiocarbon dating method for better hazard assessment.
Key Words
Geology / Quaternary Research / Geochronology
Research Activities

Many earthquakes and tsunamis have been occurred around Japan islands. Traces of such events were records as event deposits in geological stratum. I explore the chronology of event deposits to know the event history for better hazard assessment. 

Selected Works

Ishizawa, T., Goto, K., Yokoyama, Y., Goff, J., 2020. Dating tsunami deposits: present knowledge and challenges. Earth-Science Reviews, 200, doi:10.1016/j.earscirev.2019.102971.

Ishizawa, T., Goto, K., Yokoyama, Y., Miayiri, Y., 2019. Non-destructive analyses to determine appropriate stratigraphic level for dating of tsunami deposits. Marine Geology, 412, 19-26, doi:10.1016/j.margeo.2019.02.009.

Ishizawa, T., Goto, K., Yokoyama, Y., Miayiri, Y., Sawada, C., Takada, K., 2018. Reducing the age range of tsunami deposits by 14C dating of rip-up clasts. Sedimentary Geology, 364, 334-341, doi: 10.1016/j.sedgeo.2017.09.008.

Ishizawa, T., Goto, K., Yokoyama, Y., Miayiri, Y., Sawada, C., Nishimura, Y., Sugawara, D., 2017. Sequential radiocarbon measurement of bulk peat for high-precision dating of tsunami deposits. Quaternary Geochronology, 41, 202-210, doi:10.1016/j.quageo.2017.05.003.

Selected Memberships
  • Japan Geoscience Union
  • The Geological Society of Japan