[おうとうき, outouki] (n) (太宰治) anniversary that celebrates author Dazai Osamu's birthday, and incidentally, the day his body was found after he was involved in a double suicide
[たざんのいしもってたまをおさむべし, tazannoishimottetamawoosamubeshi] (exp) (arch) (proverb) (See 他山の石) one should learn from other's mistakes; stones from other mountains can be used to polish one's own gems