いち 一道 いちどう 四十 よんじゅう さん けんだったら
ichito ichidōni fuyonjū sankendattara

Noun
Da Copula

The "-tara" conditional form ("if/when…") of 一都一道二府四十三県

1. If/when it were one capital, one castle, two prefectures, and forty-three counties.

Tara Conditional