Members

Speciality

Geophysical exploration, Geotechnical engineering

Research

• Development of the liquefaction investigation, evaluation technology
• Development of the thermal conductivity profiling technology
• Development of multi transmission high-speed electric exploration, and direct push technology

Speciality

Geophysical exploration

Research

• Seismic exploration
• Ground penetrating radar

Speciality

Acoustic Mapping

Research

• Geological mapping using multibeam echo sounder and sidescan sonar systems
• Investigation of seafloor spreading mechanisms along the Knipovich Ridge in Atlantic Ocean and the Mariana backarc spreading ridge
• Investigation of distribution of hydrothermal vents in Indican Ocean, Okinawa Trough, and southern Mariana Trough
• Elucidation of offshore mud volcano activities
• Study on shallow methane hydrate along eastern margin of Japan Sea

Speciality

Geophysical exploration, Rock physics, Physical volcanology, groundwater hydraulics

Research

• Development of mineral identification methods on basis of induced polarization (IP) measurements
• Evaluation of characteristics of groundwater flow by direct current (DC) resistivity methods
• Exploration of regional geothermal systems by magnetotellurics (MT) and electromagnetic (EM) methods
• Evaluation of volcanic gas fluxes from resistivity structures beneath volcanic areas
• Electromagnetic study on evolution of hydrothermal systems beneath volcanic areas

Speciality

Computational Fluid Dynamics, Reservoir Engineering

Research

• Numerical simulation on multi-component multi-phase fluid flow and geophysical response
• Main themes: CO₂geological storage and seepage in the ocean, geothermal

Speciality

Applied geophysics, Seismic imaging, Seismic wave propagation, Near-surface geophysics, Borehole geophysics, Geotechnical engineering

Research

• High-resolution imaging/monitoring of subsurface using seismic waves: Full waveform inversion (FWI) and Least-squares migration (LSM)
• Borehole geophysics: VSP, crosswell seismics and borehole guided (tube) waves
• Green's function retrieval: Seismic interferometry and Marchenko redatuming
• Seismic methods for Geotechnical engineering
• Theoretical and computational modeling of waves in solid-fluid coupled system
• Ultrasonic laboratory experiments
• Global and regional seismology

Speciality

Geophysical exploration, Rock physics

Research

• Resource investigation using the electrical and electromagnetic methods
• Electrical property measurements of rock

Speciality

Gravimetry, Self-Potential, Geophysical monitoring, Rock physics, Electrochemistry

Research

• Subsurface structure investigation by using gravity and gravity gradient surveys
• Gravity and self-potential monitoring in geothermal resource development and CO2geological storage
• Ultrasonic testing on rocks, soils and construction materials.

Speciality

Geophysical exploration

Research

• Evaluation of interrelationship between space, time and density Eresolution of muography
• Development and performance evaluation of methods of joint inversion using muography and seismic exploration

Speciality

Magnetotelluric survey, Volcanology, Geoelectromagnetism

Research

• Imaging subsurface structure of volcanoes and fault zones
• Study on Magnetotelluric data using numerical modeling