Dentaku

Boku wa ongaku ka
(I'm a musician)

Dentaku katate ni
(With pocket calculator in my hand)

Tashi tari
(Adding)

Hii tari
(Subtracting)

Sosa shite
(Controlling)

Sakkyoku suru
(Composing)

Kono botan oseba
(By pressing down a key)

Ongaku kanaderu
(It plays a little melody)