Awarded Papers.- Overview of Awarded Papers – The 20th Annual Conference of JSAI.- Translational Symmetry in Subsequence Time-Series Clustering.- Visualization of Contents Archive by Contour Map Representation.- Discussion Ontology: Knowledge Discovery from Human Activities in Meetings.- Predicting Types of Protein-Protein Interactions Using a Multiple-Instance Learning Model.- Lattice for Musical Structure and Its Arithmetics.- Viewlon: Visualizing Information on Semantic Sensor Network.- Cooperative Task Achievement System Between Humans and Robots Based on Stochastic Memory Model of Spatial Environment.- People Who Create Knowledge Sharing Communities.- Logic and Engineering of Natural Language Semantics.- Logic and Engineering of Natural Language Semantics (LENLS) 3.- A Dynamic Semantics of Intentional Identity.- Prolegomena to General-Imaging-Based Probabilistic Dynamic Epistemic Logic.- Logical Dynamics of Commands and Obligations.- On Factive Islands: Pragmatic Anomaly vs. Pragmatic Infelicity.- Aspects of the Indefiniteness Effect.- Interpreting Metaphors in a New Semantic Theory of Concept.- Covert Emotive Modality Is a Monster.- Conversational Implicatures Via General Pragmatic Pressures.- Dake-wa: Exhaustifying Assertions.- Unembedded ‘Negative’ Quantifiers.- Learning with Logics and Logics for Learning.- The Fourth Workshop on Learning with Logics and Logics for Learning (LLLL2006).- Consistency Conditions for Inductive Inference of Recursive Functions.- Inferability of Closed Set Systems from Positive Data.- An Extended Branch and Bound Search Algorithm for Finding Top-N Formal Concepts of Documents.- N-Gram Analysis Based on Zero-Suppressed BDDs.- Risk Mining.- Risk Mining - Overview.- Analysis on a Relation Between Enterprise Profit and Financial State by Using Data Mining Techniques.- Unusual Condition Detection of Bearing Vibration in Hydroelectric Power Plants for Risk Management.- Structural Health Assessing by Interactive Data Mining Approach in Nuclear Power Plant.- Developing Mining-Grid Centric e-Finance Portals for Risk Management.- Knowledge Discovery from Click Stream Data and Effective Site Management.- Sampling-Based Stream Mining for Network Risk Management.- Relation Between Abductive and Inductive Types of Nursing Risk Management.