>>1005920Since Moomin was brought up, Rojica to Rakkasei is similar on a surface level setting-wise. The manga itself is a mix of surreal cheerfulness with a dark streak.
Would you consider Modern Fantasy/Fantastical part of what you're looking for? If so, I'd strongly recommend you check out Spectral Wizard.
Amagoi takes place in a weird, humid mushroom rainforest world.
To Your Eternity's setting is all over the place, given the long timespan it takes place over. Starts with not-Jomon Japan, and goes from there in a bit of a cultural mix.