Hi there, I plan on getting a 14 day JR pass, starting on the 26th December and expiring on the 8th of January (the remainder of the trip will be in Tokyo where we will make use of subway lines and Hakone Freepass). The issue I have is that on the night of the 8th, I plan to be taking a sleeper train from Sapporo to Tokyo (And this crosses from 10pm till the next morning). My issue is that the JR will stop being valid on the 9th, but we will be actively be travelling at this time. Will we be charged full price for sleeper, or how will this work? Can we still board with JR on the 8th at 10pm until our exchange in Aomori? (which will be at 5.39am on the 9th) thank you!
As a side note, if we get regular JR pass, (not green), do we pay for seat reservation every time, and is it only unreserved seat that is free? What about if we want a sleeper seat - will we need to pay on top? Thank you kindly