青春18きっぷ
Meanings
1
Seishun 18 ticket; seasonal unlimited local train pass
A special discounted railway ticket sold by JR during school holiday periods, allowing five days of unlimited travel on local and rapid JR trains (excluding Shinkansen and limited express trains). The name 'Seishun 18' (Youth 18) is a brand name; it can be used by anyone regardless of age.
I traveled all over Japan using a Seishun 18 ticket during spring break.
The Seishun 18 ticket only allows travel on local trains, but it's a great deal.