Computation, Structure, and Learning
Our group, led by Assoc. Prof. Mahito Sugiyama, studies machine learning at National Institute of Informatics (NII) in Tokyo since 2017.
Machine learning is the discipline of studying intelligent computing systems, which nowadays plays a key role in artificial intelligence (AI). To reveal the nature of learning, we focus on the relationship between computational processes, discrete structures, and machine learning models.
We belong to the Department of Informatics, SOKENDAI (The Graduate University for Advanced Studies), which offers 3-year and 5-year Ph.D. courses. More information is available at the NII website.
News
- Our paper "A Complete Decomposition of KL Error using Refined Information and Mode Interaction Selection" (First author: James Enouen) has been accepted to Transactions on Machine Learning Research (TMLR) (Apr. 11, 2026). [Paper]
- Fatima Zahra Al Hajji from University of Birmingham joined our lab as an internship student (Mar. 30, 2026).
- Caleb Osae-Morgan from York University joined our lab as an internship student (Mar. 27, 2026).
- Our paper "Same Graph, Different Likelihoods: Calibration of Autoregressive Graph Generators via Permutation-Equivalent Encodings" (First author: Laurits Fredsgaard Larsen) has been accepted to AISTATS 2026 workshop: Towards Trustworthy Predictions: Theory and Applications of Calibration for Modern AI (Mar. 11, 2026)
- Assoc. Prof. Sugiyama will give a talk about "Information-Geometric Modeling and Learning" at BAQ 2026 (Mar. 4, 2026). [Slide]
- Prof. Thomas Gärtner from TU Wien is visiting our lab as a visiting professor until March (Feb. 3, 2026).
- Our two papers, "Pseudo-Non-Linear Data Augmentation: A Constrained Energy Minimization Viewpoint" (First author: Pingbang Hu) [arXiv] and "Time-Gated Multi-Scale Flow Matching for Time-Series Imputation" (First author: Hangtian Wang), has been accepted to ICLR 2026 (Jan. 26, 2026).
- Our paper "Generalized Convex Nonnegative Tensor Decomposition on Statistical Manifolds" (First author: Derun Zhou) has been accepted to Information Geometry journal (Jan. 24, 2026). [Paper]
Contact
National Institute of Informatics,
2-1-2 Hitotsubashi, Chiyoda-ku, Tokyo 101-8430, Japan
https://www.nii.ac.jp/en/about/access/
Email: mahito (at) nii.ac.jp