Maria B.
Google
It's a beautiful place to go visit and see, but isn't a 'top of the list' location to visit. If you have other things to do, do them first.
The history and building is beautiful, but if you're an English speaker, note there is nothing in English and it's a purely visual tour that will take you about 30 minutes to do. The display rooms get repetitive pretty quickly.
There are 4 floors to navigate of steep stairs in slippers as a warning for those who may be unfit or not like heights.
My advice would to just go at night time from the opposite side of the river and look at it from there. If you've ever been to a Ryokan before, this looks the same on the inside.