青春 せいしゅん いち はちきっぷであれば
seishunjū hachikippudeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 青春18きっぷ

1. if I had a Seishun 18 Kippu; if one had a Seishun 18 Kippu

Ba Conditional