Genshin Impact is a massive open-world game that just keeps expanding. With such a big map, having a mount to traverse it can be a huge help. But so far, the closest thing we have is the Waverider. You've probably seen pictures of the Waverider in Liyue and Inazuma and are wondering how to get your boat out of Inazuma.
The Waverider can leave Inazuma without glitching the game, provided you've gotten rid of the Sakoku Decree. To do this, you must complete all of the Inazuma storyline—including both of Raiden Shogun's story quests—to remove the storm that surrounds Inazuma.
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As soon as Raiden's second story quest wraps up, you can go to the nearest Waypoint and summon your Waverider. You will now be able to sail all the way to Liyue and Mondstadt if you wish, without having to worry about being blocked in by storms.
It does take a few minutes to cross the sea, so you will need to be a bit patient. Be sure to regularly check your map to make sure you're sailing toward your desired location.
For more on Genshin Impact, check out How to solve the Illusory Platform Guiding Light Mirror puzzle south of the Three Realms Gateway Offering in Genshin Impact on Pro Game Guides!