Headcanon brainstoming on Uzu no Kuni, aka Land of Whirlpools, aka home of Uzushiogakure.
I like to imagine that Uzu no Kuni is a series of islands with the largest one being the one where the village is. Additionally, I like to consider there being volcanos, because many island nations in the real world are made out of volcanic activity. It would explain Terumi Mei’s lava-jutsu, since Mizu no Kuni is also a series of (far larger) islands. Also, that due to the naturally bright hair color of the Uzumaki, at least, that maybe the islands are tropical and the people also sort of evolved to be colorful like the rest of the surrounding flora/fauna.
Obviously, the Uzumaki were a significant clan both in the village and in the country. But I think there was more to it–doesn’t there have to be? To that end, maybe the other islands of Uzu no Kuni are much smaller than the main one and maybe they keep them hidden behind seals. Perhaps each clan was in charge of a different island, with the Uzumaki island being the largest and most influential, it would become both the capitol and the ninja center–unlike the other nations in which the capitol for civilians and the shinobi hidden villages were separate, in Uzu they were one in the same. Whereas most other countries (or perhaps, not, we do only hear the origin story of Konoha) were clans banding together as martial alliances… I’m thinking that Uzushio was formed more as a university of sorts. A metropolis where all of the different clans could interact.
Which leaves an opening for what the other islands are doing and who they are controlled by. I’ll be honest, mostly this is a way to fit in cameos from other media:
edit: The seven islands of Uzushio are named things like destiny and amity and prosperity, but for the most part they are called by the names of the ruling clan.
Unmei Island = Destiny Island = Kingdom Hearts, anyone?
Hamaguri Island = Clam Island = Katekyo Hitman Reborn
Mostly because the reason why the other nations went after Uzushio wasn’t just because they were allied with Konoha but because they were too powerful. And while the Uzumaki longevity/chakra weapons/sealing is interesting, strictly put… longevity isn’t so much a threat, really. Chakra weapons didn’t seem like a bloodlimit per se, and sealing can be taught. So there must have been other things that made Uzushio a threat. Say, a clan of people whose fire actually can melt Mizu’s Yuki clan’s Hyoton? A clan whose swords can change and do jutsu in contrast to Mizu’s Seven Swordsmen? I DON’T KNOW. The possibilities are endless.
A/N: Just some short headcanon brainstorming for Uzushio. BECAUSE THEY DESERVE BETTER.