Interestingly, I came across these images on Japanese Twitter. According to the poster, they're from a comic called "24 Hours of Godzilla" illustrated by Hurricane Ryu Hariken in TV Magazine in August 1983. Apparently, it's supposed to show the daily life of Godzilla on Monster Island, where he raises his son and interacts with his monster neighbors. Most interesting though, is that it clearly depicts Godzilla eating a whale (a very large whale, at that). Going by what the poster says, this pre-dates the suggestion that Godzilla's species eats whales from Godzilla vs. Destoroyah. I just thought this was interesting, plus it suggests that the Showa Godzilla is in fact a carnivore to some extent.