This kind of old-style Japanese toilet is called "kawaya". It was usually build near or over a river stream, in which the waste would then go.
For further details, reading "Koukando 100 dakara Nagato no Oshikko Mite Kekkon Suru" is recommended.

it'll never stop being funny to me how some guys think we (women) pee out of our vaginas. cute art nonetheless, though

Lumihiutale said:

it'll never stop being funny to me how some guys think we (women) pee out of our vaginas. cute art nonetheless, though

It is a bit weird, I have known this since I was 11, it was taught in school in that grade (well, the difference in anatomy between boys and girls that is) so I find it odd how many don't have the basic know-how about this kind of stuff.