Where exactly is "Tokyo General" hospital? I have been to hospitals in Tokyo and elsewhere in the Kanto area, and I don't remember a "Tokyo General."
As to cleanliness, the only one that I saw that I thought might have a problem there was Seibo, which didn't look clean at all to me. But I thought that Tokyo University Hospital and St. Luke's in particular were excellent facilities, and certainly both compare very favorably to hospitals that I have seen here in the United States.
I didn't want to name it specifically, but since you asked it is Keio University hospital in central Tokyo with a 1000+ bed general hospital. I also visited several hospitals in other cities in Japan and most were as clean if not cleaner than your typical US hospital, which is what I expected. Keio was a bit of a shock.