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Maruyama Lab
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A lab that studies the earthquake safety of roads and cities through prediction and analysis.
AboutAbout the lab
Earthquake-resilient roads and cities, considered through prediction.
Maruyama Lab studies the safety of infrastructure facilities against natural disasters such as earthquakes.
Using ground motion information and geographic information systems, the lab estimates what damage expressways and urban road networks would suffer in an earthquake.
It also simulates road traffic flow after an earthquake, and conditions when people walk to work.
The lab is also engaged in analysis that reads damage from actually acquired data, such as aerial photogrammetry.
Key terms
- GIS
- Geographic information system. A system that overlays information such as buildings and roads on a map and analyzes it in connection with location
- Damage function
- An equation expressing the relationship between the intensity of earthquake shaking and how much a structure is damaged
- Digital surface model
- A map that represents the height of the ground surface, including buildings and trees, as numerical values on a fine grid
ResearchResearch themes
The lab uses engineering methods to study how to protect infrastructure facilities from natural disasters such as earthquakes. It predicts damage to roads and transportation systems, and its research connects to post-earthquake response.
*Illustrative imagePredicting Earthquake Damage to Expressway Networks
Using ground motion information and GIS, the lab estimates earthquake damage to transportation systems such as expressways. It estimated the distribution of ground motion along roads, compared it with actual damage data, and proposed damage functions for road structures.
*Illustrative imageRunning Stability of Vehicles Under External Disturbances
The lab uses numerical analysis to study how dynamic external disturbances such as earthquakes and strong winds affect vehicles driving on expressways. It also examines, through simulated driving experiments with a driving simulator, how Earthquake Early Warnings affect vehicles that are driving.
*Illustrative imageAnalyzing Road Traffic Flow After Earthquakes
The lab evaluates, for the Tokyo metropolitan area, how much function the road traffic network would lose in the event of an earthquake directly beneath the area. It examines travel times affected by road blockages immediately after the disaster, and the degree to which initial life-saving operations are hindered.
*Illustrative imageDamage Analysis Using Aerial Photogrammetry
The lab performs aerial photogrammetry using aerial images such as aerial photographs to create detailed digital surface models and digital elevation models. Using the resulting height data and GIS, it extracts building damage caused by earthquakes.
MembersFaculty
Maruyama Lab consists of faculty members, doctoral students, master's students, fourth-year undergraduate students, and research students.As of 2026
- ProfessorYoshihisa Maruyama
- Associate ProfessorWen Liu
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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: “Shin-Tomei Expressway 20120909” Batholith / Public domain (cropped)
- Predicting Earthquake Damage to Expressway Networks: “Quake damage Glenn Highway Palmer” Alaska Department of Transportation and Public Facilities / CC BY 2.0 (cropped)
- Running Stability of Vehicles Under External Disturbances: “SIMUVEG” Ipareja / Public domain (cropped)
- Analyzing Road Traffic Flow After Earthquakes: “Traffic Jams and people walking home through Akasaka ( )” Hikosaemon / CC BY 2.0 (cropped)
- Damage Analysis Using Aerial Photogrammetry: “Aerial Survey in Action” Chrismewse / CC BY-SA 4.0 (cropped)
- Related lab (地震災害工学研究室): “February 2011 Christchurch earthquake 15” Andy Miah / CC BY-SA 2.0 (cropped)
- Related lab (関口研究室): “2013-igcs-vieux-viel-colluviosols-luvisols (2)” CWALTER / CC BY-SA 4.0 (cropped)
- Related lab (Structural Engineering and Materials Lab.
（蔡研究室） ): “A bunch of rebar” W.carter / CC BY-SA 4.0 (cropped) - Related lab (構造安全計画
（平島 岳夫） ): “Onex-StMartin-intérieur-11” MHM55 / CC BY-SA 4.0 (cropped)
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