Herwig Unger

This book collects peer-reviewed and presented papers from 2025 9th International Conference on Natural Language Processing and Information Retrieval (NLPIR 2025), held in Kyushu University, Fukuoka, Japan during December 14–16, 2025. Nowadays, advances in computer engineering made it possible that humans may interact with the machines in their natural language either in the written or the spoken manner. At the same time, the amount of (textual) data available in big data...