Caveat: I have traveled and lived in Japan and know the language in both writing and speech.
When checking in, we had a terrible experience. Staff were extremely unhelpful in getting us oriented with the area or with setting up internet, which apparently does not work with certain models of Macs! There is no wifi in rooms, needless to say, so bring your LAN cable - which we did but still couldn't connect!
Asking about restaurants or attractions in the area, staff were much more likely to dismiss us in a very non-Japanese manner than to actually try to point out anything on the map they simply handed to us. Furthermore, for those who cannot read Japanese, this is worsened by the fact the only maps available were in Japanese (fine for us but could not imagine any non-natives figuring things out without substantial frustration).
Facilities in the room were, by Japanese standards, pretty bad. It was (at least) mostly clean, but the bathroom was not stocked with shampoo and conditioner, the hair dryer wasn't particularly working, and the shower was absolutely painful like scalding or frigid needles that we could never adjust to the right pressure or temperature.
To top it off, our clock was over an hour and a half behind (and getting worse over the course of the day), causing us to miss the checkout time which we were rather rudely called to get us out.