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Yoshimura Lab
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The lab studies lake and river water environments from the perspectives of chemistry and ecology, and applies the findings to water management.
AboutAbout the lab
Innovation in water use and environmental management
The Yoshimura Lab studies how water environments such as lakes and rivers work, and applies the findings to water use and management.
Its research has three themes: environmental photochemistry, modeling of material dynamics and ecosystems in the environment, and ecosystem services.
The lab investigates through experiments how sunlight changes substances in water, and uses computers to reproduce the ecosystems of lakes and bays.
In addition to Japan, it studies lakes in Indonesia and Cambodia, working with universities and research institutions overseas.
Key terms
- Environmental photochemistry
- A field that studies, from an environmental perspective, the reactions in which substances in nature are changed by sunlight
- Dissolved organic matter
- A collection of organic compounds dissolved in water, derived from sources such as fallen leaves, living organisms, and wastewater
- Ecosystem services
- The benefits that natural ecosystems provide to people, such as purifying water and producing food
NewsLab news
View More ↗ResearchResearch themes
Focusing on water-related issues, the lab deepens scientific understanding of aquatic ecosystems and water environments. It aims to turn that understanding into concepts and tools for environmental assessment and management, and to work with society on the conservation and management of water environments.
*Illustrative imageLight-Generated Radicals and Water Quality
Dissolved organic matter exposed to sunlight undergoes a variety of photochemical reactions. The lab examines treated wastewater from different sewage treatment methods, and uses chemometric methods to clarify the photoproduction of free radicals and the water quality transformations they cause.
*Illustrative imagePhotochemistry and Carbon in Tropical Lakes
In tropical lakes with intense solar radiation, photodegradation and photosensitization are thought to play larger roles than in temperate and cold regions. The lab conducts international joint experiments in lakes in Indonesia, Cambodia, and Japan to examine their effects on carbon dynamics.
*Illustrative imageSuppressing Cyanobacterial Blooms with Photocatalysts
Targeting cyanobacterial blooms, a problem in many lakes around the world, the lab is developing photocatalysts that generate reactive oxygen species from sunlight, and is quantitatively evaluating whether they can inactivate cyanobacterial cells.
*Illustrative imageHow Rivers Affect Suruga Bay
Using a simulator of Suruga Bay, the lab uses scenario analysis to examine how changes in river discharge alter nutrient dynamics and plankton production in the bay, and quantitatively evaluates the connection between forests and the sea.
MembersFaculty
The Yoshimura Lab consists of faculty members, researchers, technical support staff, administrative support staff, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorChihiro YoshimuraPublications ↗
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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: “Tama River, Japan; August 2016 (02)” 雷太 / CC BY 2.0 (cropped)
- Light-Generated Radicals and Water Quality: “The River Kennet, Chilton Foliat - geograph.org.uk - 648158” Andrew Smith / CC BY-SA 2.0 (cropped)
- Photochemistry and Carbon in Tropical Lakes: “Lake Toba from Simalem, North Sumatra” Chapsorini / CC BY-SA 4.0 (cropped)
- Suppressing Cyanobacterial Blooms with Photocatalysts: “Algal bloom at Anderson Lake State Park” ECTran71 / CC BY-SA 4.0 (cropped)
- How Rivers Affect Suruga Bay: “Phytoplankton bloom off the coast of Tunisia (MODIS )” Jeff Schmaltz, MODIS Land Rapid Response Team, NASA GSFC / Public domain (cropped)
- Related lab (藤井研究室): “Aeration tank activated sludge process STP Bengaluru India” Vraj Acharya, WELL Labs / CC BY-SA 4.0 (cropped)
- Related lab (花岡研究室): “Container-Terminal Bremerhaven 02” H. Zell / CC BY-SA 3.0 (cropped)
- Related lab (千々
和研究室): “Ayunose bridge 1” MK Products at Japanese Wikipedia / CC BY-SA 3.0 (cropped) - Related lab (松﨑研究室): “022srUSGSCyprusVia” H.G. Wilshire, U.S. Geological Survey / Public domain (cropped)
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