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International Agricultural Development Lab (Yamamoto Lab)
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The lab focuses on the connections among forests, rivers, and the sea, and studies how to restore seaweed beds and protect coastal environments.
AboutAbout the lab
Focusing on the connections among forests, rivers, and the sea
The International Agricultural Development Lab (Yamamoto Lab) studies the development of environmental technologies and the conservation of coastal and marine ecosystems, with a focus on the connections among forests, rivers, and the sea.
To address isoyake, in which seaweed communities (seaweed beds) decline and disappear, the lab develops technologies that restore and create seaweed beds by supplying iron, through both fundamental research and field trials.
To protect coastal ecosystems, the lab also studies the movement of materials, centered on iron, in river basins and coastal areas.
The lab also works on marine environmental conservation using underused resources such as agricultural waste.
Key terms
- Seaweed bed (moba)
- An area of shallow sea, such as a rocky seabed, where seaweed grows densely like a forest or grassland
- Isoyake
- A phenomenon in which seaweed declines or disappears from shallow rocky seabeds, causing the loss of seaweed beds
- Steel slag
- A by-product generated when iron is produced at steelworks. It contains iron and other elements
ResearchResearch themes
The lab studies the development of environmental technologies and the conservation of coastal and marine ecosystems, focusing on the connections among forests, rivers, and the sea. Its work rests on three pillars: technologies to restore seaweed beds, the movement of materials in rivers and coastal waters, and marine environmental conservation using agricultural waste.
*Illustrative imageRestoring seaweed beds with underused resources
The lab researches and develops a technology to restore seaweed beds by supplying iron through "iron-supply units" made from steel slag and wood-based compost. Its field sites are Mashike Town in Hokkaido and Tsushima in Nagasaki Prefecture.
*Illustrative imageMovement of materials through forests, rivers, and the sea
The lab examines the connections among forests, rivers, and the sea in Kesennuma Bay and the Chikugo River, based on the movement of iron, nitrogen, phosphorus, and organic matter. It also studies the effects of rice paddies on coastal environments and the relationship between changes in the marine environment and the distribution of seaweed beds.
*Illustrative imageProtecting the marine environment with agricultural waste
The lab is investigating ways to use crop residues to reduce marine plastic waste and protect the marine environment.
MembersFaculty
The Yamamoto Lab consists of faculty members, academic specialists, and doctoral, master's, and undergraduate students (including those in an international agricultural development course taught in English).As of 2025
- ProfessorMitsuo YamamotoPublications ↗
- Assistant ProfessorYulina HanePublications ↗
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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: “Kesennuma Bay - panoramio” Satoh Junpei / CC BY-SA 3.0 (cropped)
- Restoring seaweed beds with underused resources: “Kelp forest Channel Islands” PatríciaR / CC BY-SA 2.5 (cropped)
- Movement of materials through forests, rivers, and the sea: “Chikugo-river Ukiha-Hita” Bakkai / CC BY 3.0 (cropped)
- Protecting the marine environment with agricultural waste: “Plastic Litter, Ivy Cove” Partonez / CC BY-SA 4.0 (cropped)
- Related lab (International Environmental Economics Lab): “Crops Kansas AST 20010624” NASA / Public domain (cropped)
- Related lab (International Plant Resource Science Lab (Miyazawa Lab)): “Organic-vegetable-cultivation” Hajhouse / Public domain (cropped)
- Related lab (Global Forest Environment Lab): “8 Aerial view of indigenous forest canopy - N Plettenberg bay” Abu Shawka / CC BY-SA 4.0 (cropped)
- Related lab (Kato Lab): “Rice fields bohol philippines 2017” Øyvind Holmstad / CC BY-SA 4.0 (cropped)
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