But wait, there's more. I said earlier that we get in the tub after showering so even after the four of us have taken a bath, the water is quite clean. Rather than letting it go down the drain, we use a special hose attached to our washing machine that siphons water from the bathtub to wash clothes. Pretty nifty. Most washing machines sold here come with these gadgets.
Our new place doesn't have this but most toilets in Japan have big (大) and small (小) flushing options. The uses are self-evident.