✔ 最佳答案
no need to go to ticket office.
if station have sell 新幹線ticket machine,
you can book a reserved seat or a nonreserved seat by
credit card.
of course can pay by cash too.
2009-08-26 18:17:03 補充:
here is website about how to book by ticket machine.
website is japanese only.but ticket machine have english menu.
http://www.jreast.co.jp/mv-guide/demo/index.html