飛ぶ鳥跡を濁さず（とぶとりあとをにごさず）
日文單字
意思：不留痕跡
English: it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place, one should see that all is in good order
日文單字
意思：不留痕跡
English: it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place, one should see that all is in good order