The JR Pass is a special pass available only to those entering Japan on a tourist visa. It allows for unlimited travel around Japan on JR lines usually at a price much less than purchasing individual tickets.
Japan is the most amazingly wonderful place I have every been to and I'm quite well travelled.
While the history, culture and food of Japan were all amazing, in a tour meticulously organised and flawlessly executed, it's the warmth of it's people that will stay with me forever.