Yes, I read that book just after it came out. And I refer to it in the future "Notes ... TatMats #41."
It's one of the excellent books on Japan that taught me more about the country than I really wanted to know. Nevertheless, it provided essential knowledge to understand how the country is run.
I recall that Kerr stated how radically different Tokyo was from Hong Kong or Singapore. About 7 years after I left Japan, I moved to Singapore, and realized how true his statement was.