Japanese Idioms by Barron's

For learning Japanese, one of my new favorite books is Japanese Idioms by Barron's. It is a small pocket sized book with more than 2000 commonly used idioms. Idioms are a very difficult part of gaining fluency and books like Japanese Idioms make the task a little bit easier. The book provides at least one example sentence for every idiom, but you will still need to have a friend or other person to converse with regularly in order to really get comfortable with the idioms.

This is not a book on vulgarities, but is instead a book on basic common phrases similar English's "kill two birds with one stone" or "I'm so hungry I can eat a horse."

Very useful and fun book, especially if you know someone who can help work out when to use them.