東北 とうほく地方 ちほう太平 たいへい よう おき地震 じしんだったら
tōhokuchihō taiheiyōoki jishindattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 東北地方太平洋沖地震

1. If/When the Tōhoku-Pacific Ocean Earthquake happened; Had the Tōhoku-Pacific Ocean Earthquake occurred

Tara Conditional