Apparently pizza isn't as common in Japan as it's in the West (and countries founded by the West) and it's ungodly expensive as well, so it might explain for a large part the "stark difference between farm life and urban life in Japan". Although that's just something I read from some Japan blog years ago, so who knows if it's true.

I was reading the manga before the anime launched and thus this show was a nobrainer for me. Whilst I have never lived at an active farm I have far more than simple passing experience from such circles due to special circumstances I won't go into here, but nevertheless that's probably one big reason why I found this story extra interesting.