西武 せいぶ新宿 しんじゅく せんであれば
seibushinjukusendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 西武新宿線

1. If it were the Seibu Shinjuku Line; If the Seibu Shinjuku Line were the case

Ba Conditional
Business