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Information Knowledge Network Lab
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A lab that uses algorithms to process large-scale real-world data at ultra-high speed.
AboutAbout the lab
Taking on large-scale data with algorithms.
The Information Knowledge Network Lab studies algorithms and artificial intelligence, with knowledge discovery and information retrieval as its themes.
Based on algorithms, the lab tackles head-on the ultra-fast processing of large-scale, unstructured spatiotemporal data from the real world.
Its core is basic research on discrete algorithms, and it also covers applications to artificial intelligence and big data.
The lab suits people who enjoy thinking about mathematics and how systems work, and people who like writing programs are also welcome.
Key terms
- Discrete algorithms
- Computational procedures for data represented by separate, discrete values, such as graphs and strings
- Data structures
- Ways of deciding how to arrange and store data inside a computer. They determine how quickly the data can be searched
- Data mining
- Techniques for extracting useful rules and patterns from large amounts of data
NewsLab news
A master's student received the Best Student Paper Award at WALCOM 2026
A master's student received the Outstanding Research Award at the 21st Web Intelligence and Interaction Workshop
Prof. Arimura received the Test of Time Award at CPM 2024
ResearchResearch themes
The research themes are knowledge discovery and information retrieval. Centered on basic research on discrete algorithms, the lab works on graph algorithms, string algorithms and data structures, data mining, and machine learning, and extends to applications in artificial intelligence and big data.
View More ↗MembersFaculty
The members of the Information Knowledge Network Lab consist of faculty, a secretary, and master's and undergraduate students.As of 2026
- ProfessorHiroki Arimura
- Associate ProfessorYasuaki Kobayashi
- Assistant ProfessorTatsuya Gima
VoicesStudent voices
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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: “Code on computer monitor (Unsplash)” Markus Spiske markusspiske / CC0 (cropped)
- Related lab (Algorithms Lab): “Sorting shellsort anim” Simpsons contributor / CC0 (cropped)
- Related lab (Large-Scale Knowledge Processing Lab): “Network Visualization” Martin Grandjean / CC BY-SA 4.0 (cropped)
- Related lab (Language Media Lab): “Rosetta Stone” Hans Hillewaert / CC BY-SA 4.0 (cropped)
- Related lab (Intelligent Software Lab): “Yujing Line expressway and Provincial Highway at midnight” Guanting Chen / CC BY-SA 4.0 (cropped)
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