In one of the subway stations in Nagoya I finally came across a different toilet, a modern take on an old classic. This is the traditional style of Japanese toilet, that which you will most likely come across in the less-developed parts of the country.
Essentially it is a flushable version of a hole in the ground. How you position yourself as to not soil your trousers I am not sure. I imagine it takes some getting used, but I have no intention of finding out... Nevertheless, we have progress, and there is hope for more!