YOU SAID:

The day is young and so am I

INTO JAPANESE

日は若いし、私もそうです。

BACK INTO ENGLISH

Young, and so am I.

INTO JAPANESE

ヤングは、私もそうだし、。

BACK INTO ENGLISH

And young, I said.

INTO JAPANESE

若いなぁと。

BACK INTO ENGLISH

A young heart.

INTO JAPANESE

若い心。

BACK INTO ENGLISH

Young at heart.

INTO JAPANESE

気が若い。

BACK INTO ENGLISH

Young at heart.