There is good item for traveling around in Japan , called “Seishun 18”.
(Reference: Wikipedia)
It is provided by Japan Railway(JR). So that there are advantages like below
- You can use JR train (not other train) as much as you want in ONE day
- Price is 2370 per ticket (5 ticket in one set, so that price is 11,850. You cannot by only one ticket.)
- You can buy almost all the station of JR in Tokyo, even outside of Tokyo.(You should check the website below in case)
http://www.jreast.co.jp/e/pass/seishun18.html