When nature calls at the beachside Mumin Papa Cafe in the city of Akashi (Hyogo prefecture), patrons have the luxury of using an underwater restroom built into the side of a giant aquarium filled with exotic fish and a sea turtle that likes to watch. According to the cafe owner, the 30-million-yen ($270,000) sub-aquatic restroom is designed to recreate the pleasant sensation of relieving yourself while swimming in the ocean. Unfortunately for male patrons, however, the submerged toilet is for women only. When asked about the voyeuristic turtle, the owner admits it is male and a bit of a letch.Source

Funny wc signs, some are easy to understand others not. I don't get the one with a pizza slices.

Here's a special dedicated WC webpage to find out where you nearest loo is - Public Toilets Database.

It's a pity to spoil such beauty :D