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Toriumi Lab
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The lab analyzes and designs how society works, using data from social media and from human movement.

AboutAbout the lab
Better social systems, built from data.
The Toriumi Lab studies computational social science and the social application of artificial intelligence.
Its subject is systems formed by large numbers of people, such as societies and groups, and its research rests on three pillars: mining, modeling, and design.
Through the analysis and design of social media, the analysis of spatiotemporal data, and research on complex networks, the lab aims to realize better social systems.
Key terms
- Computational Social Science
- A field that uses large-scale data, such as social media posts and location data, together with computers to study how people and society work
- Complex Networks
- Network structures in which many nodes and links are intricately connected, like the connections between people
- Game Theory
- A mathematical theory for analyzing situations in which multiple people decide how to act by anticipating each other's choices
NewsLab news
Paper published analyzing changes in emotion on social media and in mass media
Lab introduced at the admissions information session for the Department of Systems Innovation
Paper published on a method for making networks robust against localized attacks
Paper published analyzing how discourse about the Hong Kong protests was received
Paper published on a multilingual analysis of pro-Russian disinformation during the invasion of Ukraine
ResearchResearch themes
The lab's main research themes are the design of social systems based on computational social science and the social application of artificial intelligence. Focusing on systems formed by large numbers of people, and built on the three pillars of mining, modeling, and design, the lab aims to realize better social systems.
*Illustrative imageSocial Media Analysis and Design
The lab analyzes people's behavior on social media and online news. It investigates how online pile-ons (flaming), disinformation, and misinformation spread, and explores ways to prevent them. It also works on designing social media based on game theory.
*Illustrative imageSpatiotemporal Data Analysis
The lab analyzes data that contains time and location information. Its themes include analyzing human mobility using GPS and mobile phone location data, and applying the results to marketing and tourism strategy.
*Illustrative imageComplex Network Science
The lab analyzes the relationship between how information spreads and the structure of networks. It also studies network robustness and the inference of types of ties in social networks.
*Illustrative imageSocial Applications of Artificial Intelligence
The lab applies artificial intelligence techniques to real-world social problems. Its work includes building agents that learn by playing the Werewolf game, and predicting which users will leave (churn) on CtoC sites, where individuals buy and sell directly to each other.
MembersFaculty
The members of the Toriumi Lab consist of faculty, project researchers, project specialists, visiting researchers, joint researchers, doctoral, master's, and undergraduate students, and working-professional research students.As of 2026
- ProfessorFujio ToriumiPublications ↗
- Assistant ProfessorMasaki ChujyoPublications ↗
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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: “Social Network Visualization” Martin Grandjean / CC BY-SA 4.0 (cropped)
- Social Media Analysis and Design: “Dilema do Prisioneiro” Leandrosalvador / Public domain (cropped)
- Spatiotemporal Data Analysis: “DZ6 2599 Nighttime city street streaked with colorful light trails as traffic races by” PattayaPatrol / CC BY-SA 4.0 (cropped)
- Complex Network Science: “SocialNetworkAnalysis” Martin Grandjean / CC BY-SA 4.0 (cropped)
- Social Applications of Artificial Intelligence: “AI Artificial Intelligence concept ( )” Jernej Furman from Slovenia / CC BY 2.0 (cropped)
- Related lab (大澤研究室): “Wikidata in the Linked Open Data cloud” Thomas Shafee / CC BY 4.0 (cropped)
- Related lab (原研究室): “Cityscape of Tokyo, view from Tokyo Skytree ( by Takeishiwataru @Pixabay 1272392)” Takeishiwataru / CC0 (cropped)
- Related lab (坂田・森・浅谷・西本研究室): “Social Network Visualization” Martin Grandjean / CC BY-SA 4.0 (cropped)
- Related lab (和泉研究室): “Scramble from above, SHIBUYA SKY ( ) (cropped)” Sei F from Tokyo, Japan / CC BY-SA 2.0 (cropped)
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