I was speaking with a friend who told me about his travels on business to Tokyo and a couple hotels he really liked. They are: Grand Prince Akasaka
http://www.princejapan.com/GrandPrinceH ... /index.asp
and
Okura
http://www.okura.com/tokyo/
But of course to the true fan these hotels will have to wait until after the initial visit to the Park Hyatt!