松花堂 しょうかどう弁当 べんとうであれば
shōka dō bentōdeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 松花堂弁当

1. If it were a Matsuhotaka-do bento; Assuming it's a Matsuhotaka-do bento

Ba Conditional