Sure. Fanfiction often plays with the established canon. Maybe in a fanfic, Kushina was on a diplomatic mission to Kumo when she went into labor prematurely. Or perhaps there was a prophecy in Kumo related to Naruto's birth, and they managed to bring Kushina there just in time for him to be born. It's all about creative freedom in fanfiction.
Yes, in fanfiction, anything can be possible. Writers can create alternate universes where Naruto is born in Kumo instead of Konoha. They can come up with various reasons for this change, like a mission that led his parents to Kumo before his birth or some sort of political arrangement.
One possible development is that Naruto would have a different sense of identity. In Kumo, he wouldn't be the 'container of the Nine - Tails' in the same way as in Konoha. Kumo might have different plans for him regarding the Nine - Tails' power. This could lead to him either suppressing the power more or using it in a more aggressive way. His social status in Kumo would also shape his character. If he was seen as a valuable asset from the start, he might have a more confident and perhaps even arrogant side to his personality, or if he was treated with suspicion because of his connection to Konoha in some way, he could be more of an outcast with a determination to prove himself worthy of Kumo.
Well, a lot would change. Firstly, his connection to the Nine - Tails would be perceived differently in Kumo. Kumo has its own political and social environment. Naruto might not face the same level of ostracism as he did in Konoha. He could be seen as an asset from the start. Also, the story's power dynamics would shift. Kumo's ninja might have different ways of dealing with the power of the Nine - Tails within Naruto. And his relationships with other villages, especially Konoha, would be more complex and likely start from a more adversarial position.
If Naruto was born in Kumo, his entire upbringing would be different. He would be exposed to Kumo's culture and ninja training methods from the start. This might make him more aggressive in his fighting style compared to the Naruto we know from Konoha. Also, his relationships would be completely altered. He might not have the same bond with characters like Iruka or Kakashi, and instead form new friendships in Kumo.
One possible plotline could be that Kumo is under attack by a powerful and mysterious enemy. Naruto, being the hero he is, hears about it and rushes to save the day. He might use his newfound Sage Mode powers or his ability to connect with the Nine - Tails to fend off the attackers.
One possible plot twist could be that Naruto discovers a secret connection between his family and someone in Kumo. This could completely change his understanding of his past and future.
One possible plot development could be that Naruto's friends in Konoha realize he's missing and start a search mission. They might suspect Kumo immediately due to the history of tensions between the two villages. Meanwhile, in Kumo, Naruto could be held in a secret location. Some in Kumo might want to use him as a bargaining chip against Konoha, while others might see his potential and try to turn him into an asset for Kumo.
In a plotline, Naruto could be caught in a natural disaster that occurs near Kumo. The Kumo shinobi, with their strong sense of honor and duty, rescue Naruto. Once rescued, Naruto could learn some unique Kumo - style jutsu or training methods while he is there, which he later brings back to Konoha to improve his own skills and share with his comrades.
Well, one potential partner could be Omoi. I know he's male, but in some fanfictions, gender - bending or same - sex relationships are explored. Omoi's unique personality, with his over - thinking and yet loyal nature, could create an interesting relationship with Naruto. However, if we stick to the more traditional female partners, Yugito Nii could also be a great choice. She was a jinchuriki, just like Naruto, and they could share a special bond based on that shared experience.
Naruto would probably use his friendly and outgoing nature to adapt. He'd start by getting to know the people around him, like his new family and the local ninjas. He might also be interested in Kumo's unique jutsu and training methods, which would help him fit in. And of course, he'd keep his goal of promoting peace between Konoha and Kumo in mind, which would give him the motivation to overcome any difficulties in adapting.
One possible storyline could be Ichigo being an outcast at first because of his strange powers. But as he shows his strength and determination, he gradually earns the respect of the ninja. Another could be that he's hunted by some dark ninja organization that wants to use his unique powers for their own evil purposes.