i have visited Japan yearly for the past 5+ years, staying is all of the Hyatts numerous times -- I have never been upgraded to a suite -- although I have only been diamond for the last 3 years. I just completed a trip Osaka, Grnad Fukuoka, Fukuoka Regency, Osaka (again) and Park Tokyo. I got a very nice corner Park room in Tokyo, but nothing but RC rooms everywhere else.