Here is an amazing poem by the Buddhist priest Myōe (明恵) (1173–1232)
あかあかやあかあかあかやあかあかやあかあかあかやあかあかや月
He has been called the "poet of the moon". The translation is
“Bright, bright, and bright, bright, bright, and bright, bright.Bright and bright, bright, and bright, bright moon.”
What I found quite amazing is that this poem is a tanka: it follows the 5-7-5-7-7 pattern.
aka aka yaaka aka aka yaaka aka yaaka aka aka yaaka aka ya tsuki