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Koshizuka-Hatano-Yokokubo-Hamada-Ge Lab
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The lab builds systems that connect AI and data to solve social problems.
AboutAbout the lab
Beyond papers, toward solutions for society and the world.
The Koshizuka-Hatano-Yokokubo-Hamada-Ge joint lab studies AI-centered distributed federated systems and data spaces.
The lab builds mechanisms that allow AI and existing systems to exchange and share data safely.
The lab also works on research that uses AI to solve social problems in areas such as smart cities, government, agriculture, tourism, and education.
Working with industry, government, academia, and overseas institutions, the lab aims not only to write papers but also to make its results usable in society.
Key terms
- Data space
- An information infrastructure that lets organizations exchange only the data they need, when they need it, in a trustworthy way
- Distributed federated
- A structure in which many independent systems work together as if they were one, rather than being combined into a single huge system
- Smart city
- An initiative that brings information and communication technology and data into cities to improve daily life, work, and government
NewsLab news
Published a white paper on AI Spaces jointly with Fraunhofer ISST and Fujitsu
Established the xIPF Consortium (a general incorporated association) together with companies and other partners
A master's student received the Student Excellent Interactive Presentation Award at the HCG Symposium 2025
Received two Outstanding Paper Awards at IEEE BigData 2025
Started joint research and development with Sumitomo Corporation on using generative AI for retail data
ResearchResearch themes
The lab studies AI-centered distributed federated systems and data spaces. It analyzes real-world data collected through IoT, as well as open data, using AI and data science, with the aim of driving the digital transformation of cities and society.
*Illustrative imageFederated AI that connects AI and data
Generative AI has learned almost none of the important data held inside companies or of real-time data. The lab studies F-RAG, a technology that lets AI work with data spaces so that it can use trustworthy external data.
*Illustrative imageSlow Digital
Rather than moving away from digital technology, the lab studies how to use it for a more relaxed way of life, in which people engage their five senses and enjoy the act itself. One example is an AR app for finding four-leaf clovers.
*Illustrative imageData Spaces
The lab studies infrastructure for circulating and using data across the boundaries of fields and organizations. Besides DATA-EX, it works on public transportation, open data from governments and municipalities, and personal data management.
*Illustrative imageSmart Environments
This research brings information and communication technology and data into cities, rural areas, buildings, and more. The lab works on data-driven smart cities that use urban data to solve social problems, smart buildings, and solving regional problems in cooperation with local governments.
MembersFaculty
The members of the Koshizuka-Hatano-Yokokubo-Hamada-Ge Lab are faculty, project researchers and visiting researchers, staff, and doctoral and master's students.As of 2026
- ProfessorNoboru KoshizukaPublications ↗
- Associate ProfessorKazuma HatanoPublications ↗
- Associate ProfessorAnna YokokuboPublications ↗
- Project Associate ProfessorHamada TakeoPublications ↗
- Project Associate ProfessorHangli Ge
- Project Assistant ProfessorHirotsugu SeikePublications ↗
- Project Assistant ProfessorXiaojie YangPublications ↗
- Project Assistant ProfessorTaeka Matsubara
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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: “Takaosan Mount Takao Tokyo Night Sky )” Yuhei Mukoyama / CC BY-SA 3.0 (cropped)
- Federated AI that connects AI and data: “Centralized federated learning protocol” MarcT0K / CC BY-SA 4.0 (cropped)
- Slow Digital: “Four-leaf clover” Phyzome under the GFDL. / CC BY-SA 3.0 (cropped)
- Data Spaces: “Datacenter Server Racks ( )” Carl Lender from Sunrise, USA / CC BY 2.0 (cropped)
- Smart Environments: “Skyscrapers in Nishi-Shinjuku at night - Shinjuku Mitsui Building, Shinjuku Sumitomo Building - view from Hyatt Regency Tokyo Building ( by panayota @Pixabay 2190035)” panayota / CC0 (cropped)
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