New Frontiers in Artificial Intelligence : JSAI isAI 2021 Workshops JURISIN LENLS18 SCIDOCA Kansei AI AI BIZ Yokohama Japan November 13 15 2021 revised selected papers This book constitutes extended revised and selected papers from the 13th International Symposium on Artificial Intelligence supported by the Japanese Society for Artificial Intelligence JSAI isAI 2021 held online in November 2021. The 26 full papers were carefully selected from 86 submissions. The papers are organized in the volume according to the following workshops: 15th International Workshop on Juris Informatics JURISIN 2021; 18th Workshop on Logic and Engineering of Natural Language Semantics LENLS 18 5th International Workshop on SCIentific DOCument Analysis SCI DOCA 2021; Workshop on Artificial Affective (Kansei) Intelligence KANSEI AI 2021; 5th Workshop on Artificial Intelligence of and for Business AI Biz 2021