He could introduce some of the techniques he learned in Konoha, like the Rasengan variations. Maybe he'd also teach some of the more advanced chakra control methods that he picked up over the years.
Naruto might introduce the Shadow Clone Jutsu on a large scale. This could be used for various purposes like construction work or farming. Also, he could share his knowledge of Sage Mode techniques, which could enhance the fighting abilities of the Whirlpool ninja. He may even bring in some of the sealing techniques he learned from Jiraiya or Kushina.
Well, in this fanfiction, Naruto as the Daimyo could focus on improving the living standards of the people in Whirlpool. He'd use his connections, like with Tsunade in Konoha, to get medical help and resources. Maybe he'd also try to revive some of the lost Whirlpool clan techniques. He'd have to deal with internal power struggles too, as there would be different groups vying for influence in the newly - developing nation.
As the daimyo, Naruto would face numerous difficulties. For starters, the cultural differences within the Wave Country itself could pose a problem. There might be different ethnic groups or regions with their own traditions that conflict with Naruto's plans for unity. Moreover, he has to deal with the after - effects of any previous wars or conflicts in the Wave Country. Rebuilding damaged areas and rehabilitating the affected people would require a lot of resources and careful planning. Additionally, he has to balance his ninja duties (if he still has them) with his new role as daimyo, which could be a real headache.
It's possible that an outside force from another country is behind it. They want to weaken the Land of Fire by putting Naruto, a powerful and unpredictable element, in a position where he has to deal with political matters rather than ninja battles. They believe this will make the Land of Fire more vulnerable to their future attacks.
As the Daimyo of Whirlpool, Naruto's character would develop in terms of his leadership skills. He'd start to think more about long - term strategies for his nation. He'd also become more patient, as building a nation is not a quick process. He'd learn to balance the needs of different groups within Whirlpool, like the farmers, ninjas, and merchants. And his understanding of different cultures would grow as he has to interact with other nations in a more diplomatic way.
He might meet some of his distant Uzumaki relatives. There could be elders or other Uzumaki clan members who have valuable knowledge about his family and their special abilities.
Well, he might start by reforming the bureaucracy. He'd probably use his experiences from Konoha to bring in more efficient systems. He could also focus on improving trade relations, given his wide network of friends from different villages. Naruto would likely try to make the decision - making process more inclusive, listening to the voices of the common people and the ninja clans alike.
One challenge could be getting enough resources. Rebuilding an entire place like the Whirlpool requires a lot of materials, and they might struggle to find or afford them. Another is dealing with the opinions of other ninja villages. Some villages might not be supportive of the rebuilding for various reasons.
Perhaps they stumble upon a hidden treasure. But it's guarded by traps and illusions. Naruto's determination and Hinata's perception would be crucial in navigating through the obstacles. They'd share the excitement of the discovery and figure out how to handle the treasure, whether it's something that should be returned to its rightful place or used for a greater good.
His relationships would change a great deal. The other ninja villages may view him as a threat or a potential ally in a different way now. Since he's the heir of the fire daimyo, some might try to use his new position for their own gains. His relationships with the villagers of Konoha would also be different. He would be seen as a future leader in a more direct sense, and some might be jealous or overly deferential to him.
Perhaps an old enemy of the Fire Daimyo, like a corrupt noble or a power - hungry general within the Fire Country who sees Naruto as a threat to their plans of overthrowing the Daimyo. So they try to eliminate Naruto, but the Fire Daimyo intervenes to save him.