Volcanology; types of volcanic eruptions and related hazards; structures and field relationships of volcanic deposits, petrology of igneous and pyroclastic rocks.
Petrology; Metamorphism, deformation and fluid flow in the subducting slab surface and overriding mantle wedge. Tectonic processes in accretionary wedges and high-pressure metamorphic areas. Petrogenesis of metamorphic rocks.
Planktonic foraminiferal biostratigraphy of Neogene sequences in the northwest Pacific realm. Basement structure of the Kanto Plain using deep drilling data for estimating earthquake strong motion. Faunal analysis of planktonic foraminifera for paleoceanographic reconstruction.
Micropaleontology and stratigraphy ; reconstruction of temporal changes of paleoenvironments using statistical analysis of microfossils and sedimentary facies. Paleobiological study of speciation and migration of Ostracoda (Crustacea) with relation to geological events in Eastern Asia.
Environmental geology, 1) geological and geochemical research on arsenic contamination of ground water in Asia, 2) evaluation of the environmental changes in the intertidal flat of the Ariake Sea, Japan and western coast of Korean Peninsula. Study of bioevents and mass extinctions in geologic time.
Petrology; plutonism in and around subduction zones. Petrology, geochemistry and isotope geology of plutonic rocks. Geology and petrology for geological disposal of radioactive wastes and natural analogs.
Geomorphology, especially in rocky areas. Stability analysis of mass movements such as rock falls, landslides, surface failure and tsunami induced cliff collapses. Laboratory experiments for physical and mechanical properties of rocks.
Geodynamics; mechanisms of formation of cauldrons, rifts, and faulted basins, Diapirism and gravity effects on tectonic processes aided by centrifuge experiments and computer simulations.
Subsurface fluid dynamics and engineering ; Study of fluid flow behaviour in rock mass of reservoirs. Numerical inversion of hydraulic properties of rock mass.
Geological exploration and evaluation of thermal history of hydrothermal systems, based on fluid inclusions, hydrothermal alteration and fission-track dating. Thermochronology of sedimentary basins and other tectonic fields.
Structural geology; Geological research on accretionary complexes to understand the earthquake faulting process in subduction zones. Study of carbonaceous matter maturation by frictional heat during rapid fault slip.
Stratigrapy and sedimentology ; Sequence stratigraphy of tectonically active basins and sedimentology of siliciclastic sediments.
Petroleum geology and organic geochemistry; geochemical evaluation of petroleum source rocks. Diagenetic pathway from organisms to geochemical fossils and kerogens. Distribution of organic materials in surface sediments.
Geotechnical Engineering ; Study of the mechanical behavior of ground using finite deformation, coupled soil/water analysis, bifurcation analysis, and similar techniques.
Petrology; metamorphic geology and petrology of regional metamorphic belts. Petrology and mineralogy of high-P metamorphic rocks such as eclogites and glaucophane schists. Geochronology of metamorphic rocks. Tectonics of subduction and collision zones.
Geo-Disaster Prevention. Initiation and motion mechanisms of rapid and long traveling landslides. Prediction of landslide motion. Time prediction of landslides. Disaster prevention and mitigation. Marine landslides. Landslides triggered by earthquake, rainfall and water reservoir impoundment.