Hello everyone, I am planning a 2 week trip to japan during the 2018 golden week. The first part of trip begins apr 30 arriving in tokyo and I am planning to go to takayama using jr trains may 5 at morning and to kanazawa may 6 at morning. I have already read that shinkansens are very busy at that time (specially may 6) so I am wondering if I can book in advance trains and shinkansens from takayama to kanazawa as soon as I arrive in tokyo (april 30). Is that possible? Can I book seats in tokyo for shinkansens/trains departing from another city? Thanks in advance.