Linguistic Informatics is a research field named by the Center of Excellence (COE) Program: Usage-Based Linguistic Informatics (UBLI), which aims to systematically integrate studies in computer science, linguistics, and language education. The first part of this volume contains three lectures on spoken language analysis and corpus linguistics delivered at the Second International Conference on Linguistic Informatics held on December 10, 2005. The nine contributions in the second part come from the Collaboration Workshop on spoken language corpora between UBLI and C-ORAL-ROM, a consortium researching the spoken Romance languages. In the third part, four studies representative of Linguistic Informatics are presented. These studies deal with (1) Corpus-based analysis of linguistic usages, (2) Typological study of different languages, (3) Effective integration of e-learning and task-based face-to-face teaching and (4) Fosterage of language education researchers with expertise in the field of Linguistic Informatics.