Here ya go! After copious Googling, I came across a coupla pics of the Godzilla watermelon, and used those.
I don't read Japanese, so the white text either side of 'JA' says "LIVING" and "CONTAINER". The small text at the bottom reads "PRODUCT OF JAPAN".

Toho copyright is best-guess.
Smoothed out the donor image, but had to recreate the cityscape and text (other than that in red). Ran it through a vectoring program for a final cleanup.
Large image in PNG format attatched.
Have fun with it!
Later,
Coz.
PS. Would be cool to pair it with a side of "Gamera Meat" - as every MST3K fan knows, "Gamera is really neat, he is full of turtle meat!" :wacko