Tolong jelaskan mengenai いろはにほへと dari Iroha

i ro ha ni ho he to

chi ri nu ru wo wa ka

yo ta re so tsu ne na

ra mu u wi no o ku

ya ma ke fu ko e te

a sa ki yu me mi shi

we hi mo se su

Penulisan teksnya menggunakan kanji dan kana, konsonannya disuarakan jika diperlukan, adalah:

As flowers are brilliant but [inevitably] fall,

who could remain constant in our world? [No one could]

Today let us transcend the high mountain of transience,

and there will be no more shallow dreaming, no more drunkenness.