宝の山に入りながら手を空しくして帰る たからのやまにいりながらてをむなしくしてかえる to have a good opportunity only to let it slip from your grasp; to come home empty-handed despite having entered treasure mountain exp id Advanced ➥
宝さかって入る時はさかって出る たからさかっているときはさかってでる ill-gotten gains fade as fast as they were obtained exp proverb Advanced ➥