おおすみ がた輸送 ゆそう かんであれば
ōsumiga tayu sōkandeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of おおすみ型輸送艦

1. If it were an Oosumi-class transport ship; If it is an Oosumi-class transport ship

Ba Conditional