Seishun 18 Kippu is a seasonal pass for All JR local trains. Available period for the pass is only 3 times a year during school vacation period. You can take a local train up to 5 times with the pass. Shinkansen or Express trains can not be used. You can buy the pass at any JR stations. Basically Seishun 18 Kippu is good for who can stay in Japan longer and want to save money as much as possible and Anyperson can buy this ticket. I triped by this ticket and I plan to get on the train of all JR line. Now I had got on the train of JR east and JR toukai lines. It is increasingly difficult to get on the train that I do not get on still, because JR line that I want to get on is long distant from Tokyo.