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702 labs · 51 student voices

Genta Mizuta, Assistant Professor
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Assistant Professor Genta Mizuta studies the dynamical mechanisms that sustain the large-scale circulation of the ocean. Using simplified numerical models and similar tools, Mizuta has theoretically investigated how idealized seafloor topography affects the deep circulation. Recently, Mizuta has also become interested in studying ocean circulation using observational data. Graduate education is provided jointly by the faculty members of the Atmospheric and Oceanic Physics and Climate Dynamics course.

Yoichi Tanimoto, Professor
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The Tanimoto Lab mainly studies air–sea interaction, a field spanning meteorology and physical oceanography. Its methods include meteorological observations over the ocean, analysis of satellite and ship observation data, numerical simulations with atmospheric models, and analysis of climate models. From these various angles, the lab investigates how the ocean affects weather and climate. In the course, students learn meteorology, oceanography, and fluid dynamics from the basics in the first half of the master's program, so students can start even without having studied earth science as undergraduates.

Yoshio Kawatani, Associate Professor
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The Kawatani Lab studies atmospheric phenomena from the surface up to an altitude of 80 km from a dynamical perspective. It focuses in particular on the interactions between the troposphere and the stratosphere and mesosphere above it (the middle atmosphere). The lab combines numerical simulations with climate models and analysis of model experiment data from around the world, as well as various observational and reanalysis datasets. It also conducts research on tropospheric phenomena such as the Baiu front and the Pacific High (North Pacific Subtropical High), and on how they will change in the future.

Takuro Matsuta, Assistant Professor
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The Matsuta Lab studies how ocean currents (ocean circulation) work and how ocean circulation responds to climate change. The motion of seawater can be described by fluid dynamics and thermodynamics, but phenomena of many different scales are intertwined, so much remains poorly understood. The lab focuses in particular on regions with strong currents, such as the Antarctic Circumpolar Current and the Kuroshio Extension, and studies nonlinear processes and interactions between scales. The lab belongs to the Atmospheric and Oceanic Physics and Climate Dynamics course, where students learn the basics of physics and programming early in the master's program, so students can start even without prior exposure to atmospheric and ocean science.

Tatsuro Nakaji, Professor
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The Nakaji Lab studies forest remote sensing and techniques for examining plant function without damaging the plants. Images taken from drones, aircraft, and satellites show, over wide areas, how forest trees respond to environmental stress. Using laser scanners to measure forest structure and spectral imaging to measure leaf properties in the field, the lab develops techniques for understanding and monitoring ecosystem function. The lab welcomes students who wish to go on to graduate school.

Kentaro Takagi, Professor
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Professor Kentaro Takagi studies how much carbon dioxide forests absorb and store. The lab also investigates how these amounts vary across climate zones and forest growth stages, and how climate change and human-caused disturbance affect them. Recently, working with many collaborators, the lab has been conducting studies of forests across Asia, throughout Japan, and of entire research forests. The research forests have large-scale facilities for measuring forest carbon cycling, as well as a rich information infrastructure.

Rieko Urakawa, Associate Professor
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Associate Professor Rieko Urakawa studies how environmental change alters material cycling in forest ecosystems. Using chemical and isotope analysis of precipitation, stream water, soil, and rock, the lab investigates the biogeochemical processes that shape water quality and soil. By analyzing the wide-area distribution and long-term changes of these properties, the lab aims to clarify regional characteristics and how forest ecosystems respond to environmental change.

Mutumi Nomura, Assistant Professor
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Assistant Professor Mutumi Nomura studies how water circulates within forest ecosystems. Focusing mainly on northern Hokkaido and polar regions, the lab examines the water balance of watersheds and the mechanisms by which precipitation flows out into rivers. The research centers on the snow accumulation and snowmelt mechanisms characteristic of northern regions.

Mitsuru Ohira, Assistant Professor
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Assistant Professor Mitsuru Ohira studies how forests influence stream environments and the assembly of stream biological communities. The lab examines how disturbance, succession, and management of forests on hillslopes, in riparian zones, and across watersheds change the supply of water, sediment, and organic matter to streams, and how organisms respond. Alongside how a forest's influence spreads downstream through the stream network, the lab also considers watershed management.

Naoki Agetsuma, Professor
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The Agetsuma Lab (nicknamed the "Kedamono" [Beast] Lab) studies mammal ecology in relation to forest environments. The lab aims to clarify how wild animals adapt to seasonal and year-to-year natural variation and to disturbance from human activity. It covers a wide range of animals, from large ones such as deer to medium-sized ones such as raccoon dogs, raccoons, and monkeys, as well as bats. The main study sites are Yakushima and Hokkaido. The lab asks anyone considering graduate school to be sure to consult Professor Agetsuma before taking the entrance exam.
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