A5050202036- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- earthquake and tectonic studies
- Landslides and related hazards
- Seismology and Earthquake Studies
- Cryospheric studies and observations
- Silicon Effects in Agriculture
- Geomagnetism and Paleomagnetism Studies
- Geochemistry and Geologic Mapping
- Archaeology and ancient environmental studies
- Meteorological Phenomena and Simulations
- Pacific and Southeast Asian Studies
- Earthquake and Disaster Impact Studies
- Geological and Geophysical Studies
- Astrophysics and Cosmic Phenomena
- Earthquake Detection and Analysis
- Atmospheric and Environmental Gas Dynamics
- Radioactive contamination and transfer
- Hydrology and Watershed Management Studies
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- Soil erosion and sediment transport
- Climate variability and models
- Geological formations and processes
- Earthquake and Tsunami Effects
Kumamoto University
2014-2024
Forestry and Forest Products Research Institute
1999-2019
Kumamoto Health Science University
2016
Research Institute for Humanity and Nature
2010
Ministry of Agriculture, Forestry and Fisheries
1999
The Kumamoto earthquake (Mj 7.3) on April 16, 2016 triggered numerous landslides in and around Minamiaso Village, which is located at the western part of Aso caldera, southwestern Japan. were divided into two types: occurring steep caldera walls generated slopes post-caldera central cones Volcano. Several occurred steeper than 25° northwestern to walls, comprise pre-Aso volcanic rocks (lavas pyroclastics). largest landslide (ca. 300 m high, 130–200 wide) wall, damaging National Route 57 Hohi...
Abstract The eruption of the Tambora volcano in 1815 was initiated by two precursory Plinian falls and formed generations pyroclastic density current (PDC) deposits. In this study, we found slight changes phenocrysts (modal mineralogy, content, size), bulk-rock feldspar microlite chemical compositions, bubble number densities through stratigraphic position. fall units are characterized a lower phenocryst abundance (avg. 5.1%), smaller size 0.06 mm 2 ), higher silica content (bulk-rock,...
The Niigata (Echigo) Plain facing the Sea of Japan is located downstream two large rivers (the Shinano-gawa River and Agano-gawa River), has three sand dune ridges which formed along coastal areas during Holocene. city, with a population ~770,000, lies in lower catchment alluvial-coastal system. Despite city being approximately 160 km away from epicenter January 1st 2024 Mw 7.6 Noto Peninsula Earthquake, extensive damage to houses, buildings, infrastructure occurred throughout due pervasive...
Abstract This paper presents the chemical composition (including H2O and CO2) of matrix glass, melt inclusions in phenocrysts, their host minerals eruptive products from Aso caldera. We found a group with clearly lower potassium (0.6–2 wt % K2O at 50–70 SiO2) than previously reported high-K2O whole-rock compositions (3–5 55–70 SiO2). While most intermediate to felsic are vapor undersaturated show features H2O, CO2, accumulation, low-K2O basaltic already has higher CO2. reconcile this...
Abstract A Note has been published for this article in Hydrological Processes 18(4) 2004, 825. Both water and heat balances were studied a conifer plantation watershed south‐west Japan, within the warm‐temperate East Asia monsoon area. Forest cover consists mainly of Japanese cedar ( Cryptomeria japonica ) cypress Chamaecyparis obtusa plantations. Precipitation runoff have observed since 1991, so evapotranspiration can be compared with balance. Two meteorological observation towers built to...
The 2014–2015 eruption of the Nakadake first crater at Aso Volcano in southwestern Japan was characterized by continuous ash emissions and intermittent strombolian eruptions. In this paper, we present distribution, discharged mass, components tephra-fall deposits to examine sequence activities. We installed 21 samplers around (SW rim 9 km all directions) calculated mass ash-fall based on 28 isomass maps. From November 25, 2014, end January 2015, cumulative erupted increased a high discharge...
Abstract Volcanoes in the East Asian/Pacific region have been source of some largest magnitude eruptions during Late Quaternary, and accurately evaluating their eruptive histories is essential for hazard assessments. To overcome difficulties resolving precisely dating near‐source realm, high‐resolution (varved) sediments Lake Suigetsu (central Honshu, Japan) were examined presence non‐visible (cryptotephra) layers from 50 ka up until 30 Aira‐Tanzawa (AT) caldera‐forming event Aira volcano....