いろはー歌

Even the blooming flowers
Will eventually fade
even our world
is not eternal

The deep mountains of vanity
cross them today
and superficial dreams
shall no longer delude you





The pangram poem Iroha-uta ("ABC song/poem"), which dates to the 10th century, uses every hiragana once (except n ん, which was just a variant of む before Muromachi era).