Just finished Jake Adelstein's book Tokyo Vice on his years as a reported for the Yomiuri, the Japanese language one not the English Daily Yomiuri.
A very interesting look at working on the police beat for a major newspaper. Adelstein is the only non-Japanese reporter to have been in the press club at the Tokyo Metropolitan Police Department.
I was clued into this one by Mark Schreiber's review in the Japan Times.
This is one I can recommend reading.