Why the high tech toilets? 4th attempt

I imagine the heated toilet seats came first, because if so they’d be the only heating in the average Japanese toilet. If so, there would’ve had to be a power supply to the toilet, and after that the other bells and whistles* probably just came along typical kaizen-style as “obvious” little additions until by and by “It’s a toilet, Jim, but not as we know it” 

* In case you haven’t tried a Japanese toilet and believe that they probably have everything, what with “crazy Japan” and “high tech Japan”, they don’t have actual bells and whistles. Bird song occasionally, but no bells or whistles as far as I know…