Is There a Japanese Ebook Store?

In Japan, there's a lot more and Japanese ebook stores, they sell ebooks through their platforms. You usually sign up, make an account and then you purchase through them. I personally wouldn't do that for my personal purposes because it's like having bookshelves everywhere in different places. So maybe like you pick one to start off with. And then yeah, so like how you want to pick one that's for you, right? Yeah, what's the best way?