Furuike ya
kawazu tobikomu
mizu no oto

Literal Translation

Fu-ru (old) i-ke (pond) ya,
ka-wa-zu (frog) to-bi-ko-mu (jumping into)
mi-zu (water) no o-to (sound)

Translated by Fumiko Saisho

The old pond--
a frog jumps in,
sound of water.