I enjoyed In the Miso Soup, and found it a very entertaining read, and like Natsuo Kirino's work, gave a remarkable different view of Japanese life when compared to most other common conceptions.
Piercing is another really good read, and I favored this book above In the Miso Soup. I found it much better paced, and better structured. Also the psychological aspects are much more fully explored and detailed, as the "disturbed" characters are the two mains, as opposed to In the Miso Soup, where the story is seen through the eyes of the, how would you say, un-disturbed party, ha.