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Koshihara Lab
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A lab that applies natural materials such as wood, stone, and earth to architecture from a structural perspective.
AboutAbout the lab
Using wood, stone, and earth in architecture, from a structural perspective
Koshihara Lab studies, from a structural perspective, the potential of using natural materials such as wood, stone, and earth in architecture, with a focus on timber buildings.
Its work ranges widely, from developing new timber technologies using materials such as CLT to the seismic performance of wooden houses and wooden school buildings.
The lab also works on traditional timber architecture such as five-story pagodas and Noh stages, and on the seismic retrofitting of buildings that are cultural properties.
Key terms
- CLT
- Cross-laminated timber: large, thick wood panels made by gluing together many layers of boards, with the grain of each layer running perpendicular to the next
- Seismic retrofitting
- Construction work that adds walls, metal fittings, and the like to an existing building to increase its ability to withstand earthquakes
- Masonry construction
- A structural system in which walls and columns are built by stacking blocks such as stone or brick
NewsLab news
Participated as a director in the exhibition "TOKYO WOOD LIVING 2040"
Participated as a director in the exhibition "TOKYO WOOD TOWN 2040"
ResearchResearch themes
The lab studies how a wide range of materials, including bamboo, earth, stone, and cast iron as well as timber, can be used in architecture from a structural perspective. Its work covers everything from developing new timber technologies to structural surveys and conservation of historic buildings.
*Illustrative imageStructures of timber buildings
The lab develops new timber technologies, such as large-scale timber buildings using sawn lumber or CLT and fire-resistant timber construction. It also investigates the seismic performance of wooden houses, wooden school buildings, and five-story pagodas.
*Illustrative imageConstruction methods using bamboo, earth, stone, and other materials
The lab studies structures and construction methods that use materials other than wood, including bamboo joint methods, the seismic performance of rammed-earth walls, the performance of masonry built with Izu stone, and cast-iron joint methods.
*Illustrative imagePreservation and conservation of historic buildings
The lab carries out structural surveys for the preservation and continued use of buildings, crawling under floors and into ceiling spaces to examine the arrangement and condition of structural members. It also handles cultural properties built of reinforced concrete or masonry.
*Illustrative imageDatabases of earthquake damage and more
The lab builds a database that records earthquake damage to buildings in photographs, and a database that compiles books on structural design.
MembersFaculty
The members of Koshihara Lab consist of faculty, technical staff, researchers, doctoral and master's students, and research students.As of 2026
- ProfessorMikio KoshiharaPublications ↗
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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: “20100724 Iwakuni 5235” Jakub Hałun / CC BY-SA 4.0 (cropped)
- Structures of timber buildings: “Five-storied Pagoda - Kofukuji - Nara, Japan - DSC07533” Daderot / CC0 (cropped)
- Construction methods using bamboo, earth, stone, and other materials: “Bamboo Pavilion, 2002, made of Guadua angustifolia - McKee Botanical Garden - Vero Beach, Florida - DSC03192” Daderot / CC0 (cropped)
- Preservation and conservation of historic buildings: “Hashima, Nagasaki, Japan” Jakub Hałun / CC BY 4.0 (cropped)
- Databases of earthquake damage and more: “Houses destroyed by 2016 Kumamoto Earthquake in Mashiki, Kumamoto, Japan” Minoru Ichinose / CC BY-SA 4.0 (cropped)
- Related lab (Fujita Lab): “Zentsuji Zentsu-ji Garan Five-storied Pagoda 5” Zairon / CC BY 4.0 (cropped)
- Related lab (Asai Lab): “2010 Chile earthquake - Building destroyed in Concepción” Claudio Núñez / CC BY-SA 2.0 (cropped)
- Related lab (Sato Lab): “Komorebi” DesiPanther / CC BY-SA 4.0 (cropped)
- Related lab (Tajri Lab): “Fukuoka Growth Next the seismic retrofit carried out on the former Daimyō Elementary School building Fukuoka 20241231” Hirho / CC BY-SA 4.0 (cropped)
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