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Matsuishi Lab (Resource Biology Division)
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A fisheries resource science lab that studies how to keep fishing while protecting fish stocks.
AboutAbout the lab
Delicious sashimi, forever.
The Matsuishi Lab studies fisheries resource science to prevent overfishing, the catching of too many fish.
The lab estimates how many fish are in the sea, examines the characteristics of each stock, and considers what fishing methods can protect stocks.
Its distinguishing feature is that it aims for ways to protect stocks while continuing to fish, avoiding fishing bans wherever possible.
The lab is also pursuing research on strandings and bycatch of cetaceans such as harbor porpoises.
Key terms
- Overfishing
- Catching fish and other species faster than they can reproduce, thereby depleting the stock
- Stock assessment
- Estimating the amount of fish in the sea and how fast they reproduce, and judging how much can be caught
- Bycatch
- Organisms that were not meant to be caught getting caught in fishing nets and other gear
ResearchResearch themes
The lab works on the science of preventing overfishing so that fishery resources can be used wisely without being depleted. In addition to statistical methods for estimating stock size and evaluating fishery rules, its research covers fisheries in Japan and abroad as well as cetaceans.
*Illustrative imageStatistical Methods for Stock Assessment
The lab develops statistical methods to estimate how many fish are in the sea and how many can be caught. From data on the age, body length, and weight of catches, it estimates stock size and growth, and it also works on evaluating the accuracy of estimates and on machine learning-based forecasting of fishing conditions.
*Illustrative imageComparing Fishery Rules
Using computer simulations of the future, the lab compares which fishery rules allow fishing to continue while protecting stocks. It has tested the effects of catch limits, closed areas and closed seasons, mesh size, and fishing closures based on vessel position data.
*Illustrative imageMultispecies Fisheries in the Tropics and Developing Countries
Fisheries in Southeast Asia, South Asia, and Africa, which catch many kinds of fish with a variety of fishing gear, are a difficult area for stock management. The lab surveys the current state of fisheries and stocks in Thailand, Indonesia, Lake Victoria, and elsewhere, and shows paths toward sustainable management.
*Illustrative imageLake Angling, Stocking, and Conservation
Focusing on lakes in Hokkaido, the lab studies how recreational fishing by anglers affects fish stocks and rare species. Topics include stock assessment of kokanee (himemasu) and Miyabe charr, angler satisfaction, and the effects of stocking on the genetic diversity of wild populations.
MembersFaculty
The Matsuishi Lab consists of faculty members, research fellows, and PhD, master's, and undergraduate students.As of 2026
- ProfessorTakashi Matsuishi
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Phocoena phocoena ssp. vomerina” Ben Phalan / CC BY 4.0 (cropped)
- Statistical Methods for Stock Assessment: “Tsukiji fish market, Chuo City; November 2013 (01)” chee.hong / CC BY 2.0 (cropped)
- Comparing Fishery Rules: “Fishing boats in the port of Shiraoi, Hokkaido, April 2023” Calistemon / CC BY-SA 4.0 (cropped)
- Multispecies Fisheries in the Tropics and Developing Countries: “Fisherman begin their day - Malindi landing, Zanzibar” Christopher haslett / CC BY-SA 4.0 (cropped)
- Lake Angling, Stocking, and Conservation: “Lake Fishing ( )” Inlet Masu / CC BY-SA 3.0 (cropped)
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