This book constitutes the thoroughly refereed joint post-proceedings of the 17th and 18th annual conferences of the Japanese Society for Artificial Intelligence, JSAI 2003 and JSAI 2004, and colocated international workshops, held in Niigata, Japan in June 2003 and in Kanazawa, Japan, in May/June 2004 respectively.

The volume starts with 5 award winning papers of the JSAI 2003 main conference that are presented along with 10 revised full workshop papers, carefully reviewed and selected from the two co-located international workshops on Agent-Based Modeling (WABM 2003) and the Semantic Web workshop (SWSW 2003). The volume is concluded by 8 award winning papers from the JSAI 2004 main conference as well as 28 revised full workshop papers of the First International Workshop on Emergence and Evolution of Linguistic Communication (EELC 2004), the International Workshop on Agent-Based Modeling (WABM 2004), and the Workshop on Logic and Engineering of Natural Language Semantics (LENLS 2004).

This book presents the joint post-proceedings of five international workshops organized by the Japanese Society for Artificial Intelligence, during the 19th Annual Conference JSAI 2005. The volume includes 5 award winning papers of the main conference, along with 40 revised full workshop papers, covering such topics as logic and engineering of natural language semantics, learning with logics, agent network dynamics and intelligence, conversational informatics and risk management systems with intelligent data analysis.