Journals

• Yuchen Ji, Daichi Amagata, Yuya Sasaki, and Takahiro Hara. PolyCard: A Learned Cardinality Estimator for Intersection Queries on Spatial Polygons Journal of Intelligent Information Systems, volume xx, number x, pages xx, 2025.

Conferences

• Keito Kido, Daichi Amagata, and Takahiro Hara. Fast Approximation Algorithm for Euclidean Minimum Spanning Tree Building in High Dimensions Proceedings of the Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD), pages xxx-xxx, 2025. Special Session: Data Science: Foundations and Applications (DSFA) Code is here.
• Daichi Amagata Random Sampling over Spatial Range Joins Proceedings of the IEEE International Conference on Data Engineering (ICDE), pages xxx–xxx, 2025. Code is here.