How Much Salary of Congressional Members in Japan?

Do you know how much the congressional member in Japan gets? If you're not sure, I recommend to read this book before the next election, and then you don't want to select anyone except this author.
This author, Takashi Kawamura is the congressional member in Japan. He's disclosed the total compensation of the congressional members from local to nation. They're terrible.
As you might know, the corruption perception index 2008 was released. The Japan's ranking was 18th in the world...