Even in Kyoto

I still don't think so...mostly because of the complex parameters involved. Keep in mind that the saddle construction material can be a big factor for a lot of people, in combination with their preferred riding clothes (padded shorts vs. nylon, for instance). And the distances covered. The guy who did our bike fits said he actually thinks the ideal also changes over the course of a long ride because muscle mobility ranges change with fatigue. And a lot of people have been tinkering with bike saddles for a very long time. Some of the historic ones look pretty incredible now - hammock-like devices and such.