おおすみ がた輸送 ゆそう かんだったら
ōsumiga tayu sōkandattara

Noun
Da Copula

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

1. If it were an Ōsumi-class transport ship; Were it an Ōsumi-class transport ship

Tara Conditional