Why doesn’t the USA have lemon soda?

About a month ago I got the chance to travel to Japan with a tour group, and there were vending machines in every corner! Personally, I love sour things, especially lemons, so I got hooked on the lemon soda that seems to be so popular there. When i came back to the US, i couldn’t find anything similar! I can’t stress enough that i HATE lemon/lime sodas.. i prefer one or the other, since together it’s bland. Does anyone know some lemon soda brand that maybe I just overlooked on the shelves?