You could also try Hakone Yumoto Onsen Tenseien.

They have a “universal twin” room (2nd from the bottom): https://www.tenseien.co.jp/stay/guestroom.html

But not as nice as Pax Yoshino

It looks like you can head back to Odawara Station from Hakone-yumoto station, then take the shinkansen from there to Kyoto:

https://goo.gl/maps/BZM3xMXCSPG2

Hello

(Thanks @bookman for your answer!)

Yes, Pax Hoshino is great, but often is fully booked – so act fast!

As for getting there, take the “Romance Car” on the Odakyu Line to go right to Hakone, but as @bookman says, there are other transfers once you get there if you are doing the standard route.  All are accessible, but there are a… Read more

Hello,

Last time I was in Sapporo was about 10 years ago, but even then I had no issues with train and subway accessibility that I can recall (though, it was 10 years ago so I may have forgotten!).  If there are specific places you would like to visit, let us know and we can check relevant stations for you!
(ie if you want to go from your… Read more

When you got your JR Pass, was there any documentation that came with it?  If so, was there any information for wheelchair users?

Where did you buy it?  They should have warned you about the Green Tickets.