Kotowaza of the day: On minding one's own business

Japanese:

薮をつついて蛇を出す

Romanized:

Yabu wo tsutsuite hebi wo dasu

Meaning of Japanese:

By poking at a thicket (bush) you will drive out a snake

English equivalents:

Let sleeping dogs lie
Wake not a sleeping lion
Leave well enough alone

Related:

Open up a (whole) can of worms