Originally Posted by MSPeconomist

Imperial is a small chain: Tokyo, Osaka, and a related property in Hawaii IIRC plus I think a fourth hotel. I'm not aware that Palace has sister properties, but it wouldn't surprise me if there were a few of them.

If you want old school Japanese, there's the renovated hotel in Tokyo Station (gorgeous and in a historic building) that's now affiliated with Hyatt, probably through Small Luxury Hotels, although it tends to be full most of the time when I've tried random dates.

How about a luxury ryokan? OTOH, except for the garden and bath, they're really not so suitable for hanging around the property to use facilities or even to use the room beyond meals and sleeping. Most of them and the best examples tend to be outside of cities.