東北 とうほく関東 かんとう だい震災 しんさいであれば
tōhokukantōdaishinsaideareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 東北関東大震災

1. If the Great East Japan Earthquake…; If there had been the Great East Japan Earthquake…

Ba Conditional