Awarded Papers.- Overview of Awarded Papers: The 21st Annual Conference of JSAI.- Modeling Human-Agent Interaction Using Bayesian Network Technique.- Analysis and Design Methodology for Product-Based Services.- Consideration of Infants’ Vocal Imitation Through Modeling Speech as Timbre-Based Melody.- Metrics for Evaluating the Serendipity of Recommendation Lists.- Moving Sound Source Extraction by Time-Variant Beamforming.- Video Scene Retrieval Using Online Video Annotation.- Spatio-temporal Semantic Map for Acquiring and Retargeting Knowledge on Everyday Life Behavior.- Logic and Engineering of Natural Language Semantics.- Overview of Logic and Engineering of Natural Language Semantics (LENLS) 2007.- Semantic Heterogeneity in Evidentials.- Acts of Promising in Dynamified Deontic Logic.- Dynamic Semantics of Quantified Modal Mu-Calculi and Its Applications to Modelling Public Referents, Speaker’s Referents, and Semantic Referents.- Inverse Scope as Metalinguistic Quotation in Operational Semantics.- A Multimodal Type Logical Grammar Analysis of Japanese: Word Order and Quantifier Scope.- Coordinating and Subordinating Dependencies.- Left-Peripheral and Sentence-Internal Topics in Japanese.- Incremental Processing and Design of a Parser for Japanese: A Dynamic Approach.- Breaking Quotations.- A Modifier Hypothesis on the Japanese Indeterminate Quantifier Phrase.- A Presuppositional Analysis of Definite Descriptions in Proof Theory.- Meaning Games.- Risk Informatics.- International Workshop on Risk Informatics (RI2007).- Chance Discovery in Credit Risk Management.- Risk Bias Externalization for Offshore Software Outsourcing by Conjoint Analysis.- Extracting Failure Knowledge with Associative Search.- Data Mining Analysis of Relationship Between Blood Stream Infectionand Clinical Background in Patients Undergoing Lactobacillus Therapy.- Discovery of Risky Cases in Chronic Diseases: An Approach Using Trajectory Grouping.- Learning with Logics and Logics for Learning.- The Fifth Workshop on Learning with Logics and Logics for Learning (LLLL2007).- Mining Maximal Flexible Patterns in a Sequence.- Computing Characteristic Sets of Bounded Unions of Polynomial Ideals.- Towards a Logical Reconstruction of CF-Induction.- Juris-Informatics.- First International Workshop on Juris-Informatics.- Towards Translation of Legal Sentences into Logical Forms.- Automatic Consolidation of Japanese Statutes Based on Formalization of Amendment Sentences.- Characterized Argument Agent for Training Partner.- Assumption-Based Argumentation for Closed and Consistent Defeasible Reasoning.