うまい話はなしには裏うらがある

expression, godan verb (-ru, irregular)

if it sounds too good to be true, it probably is; there's a flip side to every coin

Proverb warning that an offer or story that seems very advantageous likely has a hidden catch or downside.

• うまい話はなしには裏うらがあるから、簡かん単たんに儲もうかるという誘さそいには気きをつけたほうがいい。

  If it sounds too good to be true, it probably is, so you should be careful of offers that promise easy money.

• うまい話はなしには裏うらがあると思おもって、その投とう資し話ばなしを断ことわった。

  Thinking it sounded too good to be true, I turned down that investment offer.