本ほん来らいであれば

expression

by all rights; properly speaking; legally speaking

Used to state what should be the case according to rules, norms, or expectations, often followed by a contrast with reality. Can imply a legal or formal standard, but also used in everyday reasoning.

• 本ほん来らいであれば、今日きょう中じゅうに報ほう告こく書しょを提てい出しゅつしなければならない。

  By all rights, I should submit the report by the end of today.

• 本ほん来らいであれば彼かれが責せき任にんを取とるべきだが、誰だれもそうは言いわなかった。

  Properly speaking, he should take responsibility, but no one said so.