Tewi, you tricked frickin' sharks to cross over to Tottori as part of your myth.
Come to think of it, going by that myth, Tewi definitely has seen the sea. I don't think a lot of Gensokyo locals have been to the sea. Hmm... There's Mamizou, I suppose. Sado is also an island.
Context: Phantasmagoria of Flower View, Tewi Stage 8.