おういとかけがいだったら
大糸掛貝だったら
ō itokakegaidattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of おおいとかけがい

1. If/when it were Ōito-kake-gai…; If Ōito-kake-gai were…

Tara Conditional
Usually Written in Kana