本ほん来らいから言いえば

expression

by all rights; properly speaking; legally speaking

Used to state what should be the case according to rules, principles, or common sense, often implying that reality differs. The 'legally speaking' gloss is a specific application of this general meaning.

• 本ほん来らいから言いえば、彼かれが責せき任にんを取とるべきだ。

  By all rights, he should take responsibility.

• 本ほん来らいから言いえば、この書しょ類るいは昨日きのうまでに提てい出しゅつしなければならなかった。

  Properly speaking, this document should have been submitted by yesterday.