Pragmatics & Beyond is an important series of books published by John Benjamins Publisher that you might find useful. These include titles such as:
Conversational dominance and gender : a study of Japanese speakers in first and second language contexts
Turn-taking in Japanese conversation : a study in grammar and interaction
Discourse modality : subjectivity, emotion, and voice in the Japanese language
To locate books in the series about a specific topic, Japanese pragmatics search using the series title and add additional keyword(s)
pragmatics & beyond Japan*