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51 labs · 0 student voices
Faculties at Hokkaido University ›
Shingo Akita, Associate Professor
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Associate Professor Akita's lab studies ways to protect seaweed beds, which are dense communities of seaweed. Seaweed beds are the foundation that supports coastal fisheries, and they also play a role in fixing carbon dissolved in seawater. Seaweed beds have declined greatly because of recent environmental changes, so the lab studies the life cycles, physiology, and ecology of kelps and Sargassum species to consider conservation methods. The lab also conducts a survey of the seaweed species growing at Cape Kattoshi in Hakodate.
Norishige Yotsukura, Professor
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Usujiri Fisheries Station is a facility of the Field Science Center for Northern Biosphere, which conducts education and research on the ecology, resources, and diversity of aquatic organisms. Located on the Pacific coast of the Minamikayabe area of Hakodate, the station sees marine environments that differ by season under the influence of warm and cold currents, and is home to rich marine life. The faculty members study the ecology of fishes that migrate between the sea and rivers, and the relationship between fishes and parasites. The lab is located at the station in Usujiri-cho, Hakodate, not on the Hakodate Campus.
Akihide Kasai, Professor
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The Kasai Lab studies what is happening in the ocean and why such phenomena occur. Estuaries and coastal seas have productivity exceeding that of tropical rainforests and provide us with abundant benefits. However, it is difficult to observe the inside of the sea directly, and much remains unknown. Using the connections among forest, river, village, and sea, environmental DNA, and numerical simulation as clues, the lab aims to contribute to the conservation of the marine environment and marine ecosystems.
Hiromichi Ueno, Professor
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The Ueno Lab studies how ocean temperature and salinity vary, and the mechanisms behind that variability. The ocean has what are called oceanic mesoscale eddies, the sea's counterparts to high- and low-pressure systems, which change temperature and salinity on scales of several months and about 100 km. Together with researchers within and outside Hokkaido University, the lab also investigates how such ocean variability affects marine ecosystems made up of plankton, fish, and other organisms. Its research combines analysis of publicly available observational data with observations from the North Pacific to the Arctic Ocean aboard the training vessel Oshoro Maru.
Hatsumi Nishikawa, Associate Professor
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The lab of Associate Professor Hatsumi Nishikawa studies the links among the atmosphere, the ocean, and marine ecosystems by making measurements of the air and the sea. It investigates how the atmosphere and the ocean influence each other in the mid-latitude ocean (air-sea interaction). Its research topics also include variability in Subtropical Mode Water, which forms in the sea south of Japan, and its effects, as well as ocean circulation and material cycling in the Southern Ocean.
Yasuzumi Fujimori, Professor
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The lab of Professor Yasuzumi Fujimori studies fishing technology that lets unwanted organisms and small fish escape and catches only the fish that are needed (selective fishing), as well as technology to prevent bycatch. Its research topics also include the selectivity and catch efficiency of fishing gear, and techniques for quantitatively sampling fish and plankton in stock surveys. The lab also applies the behavioral characteristics of fish, such as how they respond to light and water flow, to the design of fishing gear. Assistant Professor Makoto Tomiyasu studies the distribution and movements of marine organisms using acoustic signals and tags.
Tohru Mukai, Professor
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The Acoustic Measurement Lab uses sound waves to observe the sea and estimate the abundance (stock size) of marine organisms such as fish and zooplankton. Light hardly penetrates the sea and different organisms live at different depths, so sound waves, which can survey a wide area from a distance, serve as an observation tool. The lab uses ultrasound, which humans cannot hear, in fish finders and sonar, and relies on the echoes (reflected sound) returned from organisms. Professor Tohru Mukai and Assistant Professor Kohei Hasegawa work on the sound-reflecting properties of marine organisms and on developing acoustic instruments for studying abundance.
Hiroto Abe, Associate Professor
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The Satellite Resource Measurement Lab uses observation tools such as satellites to study the vast ocean environment, mainly from the perspective of physics. To study the vast ocean, observations from ships are not enough; wide-area observations by satellites and buoys are essential. Using both ships and satellites, the lab conducts fieldwork in the Arctic, the North Pacific, and the seas around Hokkaido, and also studies how the ocean environment affects marine organisms. The lab welcomes students who have a foundation in physics and want to learn oceanography and remote sensing.
Hiroki Yasuma, Professor
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The Fisheries Information Engineering Lab researches and develops fisheries systems and the technologies that support them from the perspective of information engineering. Using fish school simulation, which reproduces the movements of fish schools on a computer, the lab studies the catch efficiency of set nets and the efficiency of land-based aquaculture. The lab also uses fluid analysis and image recognition technologies to analyze flows inside aquaculture tanks and to study how fish swim from underwater video. Professor Hiroki Yasuma's research areas include acoustic observation of marine organisms, mesopelagic ecosystems, and seaweed beds.
Tsutomu Takagi, Professor
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Prof. Takagi's lab studies the mechanisms by which fish are caught, based on the physical properties of fishing gear and the behavioral characteristics of the target organisms. The lab also conducts research on how much force fish can swim with, examined from the mechanisms of their bodies, and research that measures and evaluates how schools of fish swim. To harvest fish and shellfish from the sea sustainably, the lab researches and develops fishing methods from both physical and biological perspectives, based on a correct understanding of the behavior of organisms.
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