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157 labs · 25 student voices
Faculties at Hokkaido University ›
Kazunori Yoshizawa, Professor
0 student voices
The Seismology Lab studies phenomena occurring inside the solid Earth, such as earthquakes, volcanic eruptions, and plate motion. The subsurface is extremely hot and under high pressure, which makes it difficult to dig a hole and look directly, so seismic waves are one of the few clues available. Using its own seismic waveform analysis methods, seismic tomography, and numerical simulation, the lab makes use of waves ranging from short periods to very long periods. The scales it covers range widely, from familiar ones such as volcanoes and faults to continents and the entire globe.
Toshihiro Yamada, Professor
0 student voices
The Evolutionary Paleontology research group studies geology, paleontology, and paleoenvironments based on fossils. The fossils it works with range widely, from dinosaurs to plants and cephalopods, and the group pursues the mechanisms of evolution and extinction and the relationships between organisms and their environments. The group places importance on going into the field and digging up fossils itself, and also uses the process by which organisms became fossils (taphonomy) as a clue in its research. The University Museum holds fossils mainly from Sakhalin and Hokkaido, and a great deal of research is carried out using them.
Noriyuki Kawasaki, Associate Professor
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The Geochemistry research group studies a wide range of fields in Earth and planetary science, using chemical clues centered on isotopes (chemical tracers). The faculty in this group analyze meteorites and samples brought back from asteroids to clarify the origin and evolution of the Solar System. Using electron microscopes and mass spectrometry instruments, the group examines the elemental and isotopic composition of extremely small regions. The group also works on developing new methods and instruments for analyzing materials.
Takaya Nagai, Professor
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The Earth and Planetary Materials Science Lab studies, at the atomic level, the properties of the minerals that make up Earth and the planets. Minerals are the smallest units of the materials that make up Earth and the planets, and the many phenomena that occur there ultimately trace back to the properties of minerals. The lab synthesizes minerals itself under controlled conditions, aiming to clarify their physicochemical properties and the mechanisms by which they form. Because many ceramic materials are made of minerals, understanding the properties of minerals is also important from the standpoint of materials science.
Yoshio Murai, Professor
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The Ocean Bottom Seismology and Tsunami Lab conducts research aimed at predicting the occurrence of megathrust earthquakes and tsunamis. Many of the earthquakes that occur on Earth originate beneath the seafloor, and large earthquakes at plate boundaries generate tsunamis that cause major damage. The lab investigates how they occur using two approaches: offshore earthquake observation with ocean bottom seismometers, and surveys of past and recent tsunamis. To advance this research, the lab conducts joint research with a variety of researchers and institutions in Japan and abroad.
Takeshi Hashimoto, Professor
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The Subsurface Structure Lab studies the subsurface structure related to earthquakes and volcanoes, and how it changes over time. Its current focus is subsurface exploration using electromagnetic waves (the magnetotelluric method), combined with geomagnetic mapping and monitoring and numerical modeling. The human eye cannot see even 1 cm beneath the ground, but long-wavelength electromagnetic waves make it possible to image what lies below. The lab aims to link these results to the prediction and assessment of earthquakes and volcanic activity.
Hiroshi Aoyama, Professor
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The Volcanic Activity Lab carries out observational research on volcanoes based on geophysical methods. It grew out of the Usu Volcano Observatory, established in 1977 for research on volcanic eruption prediction, and works with universities across Japan, the Japan Meteorological Agency, and others. It maintains observation facilities at the five major volcanoes in Hokkaido (Mt. Meakan, Mt. Tokachi, Mt. Tarumae, Mt. Usu, and Mt. Hokkaido-Komagatake) and at Noboribetsu volcano, and continues observations every day. The mission of this field is to catch the messages that volcanoes send and to scientifically predict how their activity will progress; in other words, to put volcanic eruption prediction into practical use.
Masanobu Yamamoto, Professor
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The Environmental Change Analysis Lab aims to reconstruct how Earth's environment has changed and to identify the causes. It focuses on how humans and the environment have affected each other since the agricultural revolution 10,000 years ago and the industrial revolution 200 years ago. Using methods from paleoclimatology and geochemistry, the lab studies past environmental change as well as the present-day carbon and water cycles of the Earth, on both land and in the oceans. By treating past and present changes as one continuous story, the lab seeks to find principles useful for predicting the future of the global environment.
Keiichiro Ohshima, Visiting Professor
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The Ocean and Sea Ice Dynamics Unit studies ocean circulation and sea ice variability, focusing mainly on polar regions and seas with sea ice. When sea ice forms, it produces heavy, cold water that drives circulation in the deep ocean. In addition, sea ice reflects sunlight strongly, which amplifies climate variability and global warming. The unit combines observations, satellite remote sensing, and numerical modeling in its research.
Jun Nishioka, Professor
0 student voices
The Pan-Okhotsk Research Center studies a region stretching from Northeast Eurasia, centered on the Sea of Okhotsk, to the western North Pacific. In this region, the effects of warming appear sharply as a decline in seasonal sea ice zones, warming of the ocean's intermediate layer, and changes in snow and ice on land. The center aims to clarify the role this region plays in global environmental change and to properly assess the impacts it receives from climate change. It monitors environmental change through satellite observations, ship-based observations, and field surveys, and has built international research networks, including with Russia.
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