動物系
kill two birds with one stone
一石二鳥
the mouth is the source of all disaster
口は災いのもと
failure teaches success
失敗は成功のもと
better to ask the way than go astray（迷う）
聞くは一時の恥、聞かぬは一生の恥
even homer（ホメロスさん） sometimes nods (no one is perfect)
サルも木から落ちる
the early bird catches the worm
早起きは三文の徳
what goes around comes around
情けは人のためならず
look before you leap
石橋をたたいて渡る
when the cat's away, the mice will play
鬼の居ぬ間に洗濯
there is no use crying over spilled milk
throw a sprat（ニシン）to catch a mackerel（サバ）
fall seven times, stand up eight
七転び八起き
you have to learn to walk before you run
千里の道も一歩から
this is no common enemy
敵もさるもの
Once-in-a-lifetime experience
一期一会
water on a frog's face
all is well that ends well
終わりよければすべてよし
the unsung（歌われていない） hero
縁の下の力もち
never put off till tomorrow what can be done today
やるなら今でしょ
It’s a small world.（Everything happens for a reason.）
love me love my dog
坊主憎けりゃ袈裟まで憎い
once you leave the temple, you're a monk
寺から出れば坊主
don't teach your grandmother to suck eggs
釈迦に説法
absence makes the heart grow fonder
Someone who lives paycheck to paycheck.
宵越しの銭は持たない