千せん丈じょうの堤つつみも蟻ありの一いっ穴けつより崩くずれる

expression, ichidan verb

a small leak will sink a great ship

Proverb meaning that a tiny oversight or minor flaw can lead to a major disaster. Often used as a warning to pay attention to small details.

• 千せん丈じょうの堤つつみも蟻ありの一いっ穴けつより崩くずれるというから、小ちいさなミスも見み逃のがしてはいけない。

  As the saying goes, a small leak will sink a great ship, so you must not overlook even minor mistakes.