I had a problem finding lemonade whilst in Japan. They just don't have it or seem to understand the concept. Lots of lemon/lime drinks etcetera but no plain lemonade.

I was in one rather upmarket venue with a Japanese friend and when I asked for lemonade they spoke to her in Japanese and then returned with freshly made lemonade made with squeezed lemons. @:-) and a good try.

It was my only complaint (and extremely trivial at that) about my whole wonderful trip to Japan.