東北 とうほく関東 かんとう だい震災 しんさいでしょう
tōhokukantōdaishinsaideshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 東北関東大震災

1. Probably the Great East Japan Earthquake.

Polite
Presumptive
Conjecture