I picked up this book at the big Kinokuniya book store on the south side of Shinjuku station.  I haven't finished it but so far I really like it.  It's kind of like "How to Win Friends and Influence People", that old book by Dale Carnegie but unlike that book, this book gives you specific things to do instead of just generalizations.

Unfortunately it's not available in the U.S.  If you want it you'll have to order it from Amazon in the UK which you can do by clicking here.