YOU SAID:

i'm over the moon with joy

INTO JAPANESE

私は喜びで月の上にいます

BACK INTO ENGLISH

I am on the moon with joy

INTO JAPANESE

私は月に喜びをもっています

BACK INTO ENGLISH

I have joy in the moon

INTO JAPANESE

月に喜びがある

BACK INTO ENGLISH

The moon has joy

INTO JAPANESE

月には喜びがある

BACK INTO ENGLISH

The moon has joy