Knowledge Acquisition System Laboratory (KASYS; Kato and Pham Laboratory) is especially interested in the research field of Information Retrieval, mainly focusing on the following fields: retrieval models and ranking, learning to rank, search intent estimation, knowledge base development, knowledge base applications, search behavior analysis, search user models, recommendation systems, and offline/online evaluation.

As of 2026, KASYS is based at the University of Tsukuba and the National Institute of Informatics, and is affiliated with the IR Group at Tsukuba.