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Toyokawa Lab
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A lab that traces the history of urban planning and redevelopment to envision the future of central Tokyo.

AboutAbout the lab
Envisioning a city's future from its history.
Toyokawa Lab studies the history of past and present urban planning and large-scale redevelopment to explore the future that central Tokyo and Japan as a whole should envision.
Its research focuses mainly on the 23 wards of Tokyo, the Tokyo metropolitan area, and regional core cities.
Because the cities of several decades from now will be extensions of today's cities, the lab sorts out the path that cities have followed in order to bring the outline of the contemporary city into relief.
The lab's motto is to read thoroughly, think thoroughly, and work hands-on.
Key terms
- Floor area ratio
- The ratio that sets the upper limit of a building's total floor area relative to the area of its site
- Urban Renaissance Special District
- A district where floor area ratio and height restrictions can be greatly relaxed in order to promote advanced land use
- Urban Redevelopment Project
- A project that consolidates finely divided land and old buildings and rebuilds an entire district to renew the city's functions
NewsLab news
View More ↗ResearchResearch themes
The lab interprets the various elements that make up a city from both institutional and spatial perspectives. The main research areas introduced here are the systems and urban spaces that students have studied so far.
*Illustrative imagePreservation and Adaptive Reuse of Historic Buildings
Historic buildings in the city center were once regarded as obstacles to urban development. The lab examines how preservation and development can coexist from many perspectives, ranging from institutions, budgets, and stakeholder interests to design and structure.
*Illustrative imageEvaluating the Actual Practice of Urban Renaissance Special Districts
In Urban Renaissance Special Districts, floor area ratio and height restrictions are greatly relaxed, allowing large-scale development. Evaluations of the 'public contributions' that developers include in their plans vary widely. Drawing on past cases, the lab examines how the system is operated and where it can be improved.
*Illustrative imageUrban Disaster Resilience and Its Assessment
Disaster prevention challenges differ by city: in regional cities, street planning and fireproofing of wooden dense urban areas; in city centers, stranded commuters and communication outages. The lab investigates plans that were realized and plans that were not, and examines them from both structural (hard) and non-structural (soft) perspectives.
*Illustrative imageHow Urban Redevelopment Projects Are Carried Out
Based on accumulated data, the lab clarifies the barriers to advancing projects and the methods of coordination among diverse participants. It also analyzes the urban spaces that result and their impact on surrounding areas.
MembersFaculty
The members of Toyokawa Lab are faculty, project researchers, and students in the master's program and the undergraduate program.
- Associate ProfessorSaikaku Toyokawa
- Assistant ProfessorDongyun Kwak
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Report an errorAbout the images
For images provided to us or used with permission, the source is listed on each line. Wikimedia Commons images are illustrative and were not taken at the lab (they are cropped). Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “Marunouchi Central Plaza with blue sky, Tokyo station and Shin-Marunouchi Building, panoramic view from JP Tower, Tokyo, Japan” Basile Morin / CC BY-SA 4.0 (cropped)
- Preservation and Adaptive Reuse of Historic Buildings: “Working on Historic Spotted Bear log building restoration ( )” Forest Service - Northern Region / Public domain (cropped)
- Evaluating the Actual Practice of Urban Renaissance Special Districts: “Roppongi Hills from Tokyo Tower” 稲妻ノ歯鯨 / CC BY-SA 4.0 (cropped)
- Urban Disaster Resilience and Its Assessment: “The disaster prevention training by Sahara fire department,Choshi-city,Japan” Katorisi / CC BY-SA 3.0 (cropped)
- How Urban Redevelopment Projects Are Carried Out: “Manchester Victoria Station Redevelopment Site (August 2014) - geograph.org.uk - 4147810” David Dixon / CC BY-SA 2.0 (cropped)
- Related lab (都市交通環境
(有賀) 研究室): “Ptld Vintage Trolley at City Hall” Steve Morgan / CC BY-SA 3.0 (cropped) - Related lab (高野洋平研究室): “Members of the Yohei Takano Laboratory” 高野洋平研究室 / 研究室の
許可を 得て 掲載 (cropped) - Related lab (松浦研究室): “Niso-Udatsu-no-Machinami ac (3)” Asturio Cantabrio / CC BY-SA 4.0 (cropped)
- Related lab (鈴木弘樹研究室
(Suzuki-lab) ): “An architectural model of the British Library” Robert-brook / CC0 (cropped)
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