expression, ichidan verb
accumulate years of experience; become proficient through experience
Idiomatic expression literally meaning 'to pass through the shell', likening experience to a turtle's growth rings. Used for someone who has gained deep skill or wisdom over many years.
彼はこの道で甲羅を経た職人だ。
He is a craftsman who has accumulated years of experience in this field.
甲羅を経た経営
The words of a seasoned business owner carry weight.