Oh, there's definitely some schlock to it, but it's charming all the same.
Of the films I mentioned above, it's closest in execution and outlook to Honda's. Both directors even employ the same basic plot set-up--an array of people from various socioeconomic levels and professions stranded, after a horrible accident, in a wasteland populated by creatures; then, under said trying circumstances, the humans themselves literally and figuratively degenerate to become the worst monsters around. Sato and Honda are clearly bothered by a perceived moral decrepitude creeping in on the heels of post-war economic success. The difference, as I see it, is that Sato's goes more directly at war, while Honda's targets the "spoils" of wealth as the main source of corruption.
I hope you enjoy. It makes the greatest hits of the Showa era list, for sure.