本土 ほんどミサイル防衛 ぼうえうだったら
hondomisairubōeudattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 本土ミサイル防衛

1. If it were a domestically produced missile defense system; If it had been a domestically produced missile defense system

Tara Conditional