Architects talking energy – in Tokyo

When I first came to Japan a quarter decade ago, toilets were in unheated spaces, and it was sometimes a shock to sit. About 20 years ago, leaders in the industry came up with a nifty solution: a small heater in the seat. Over time, more and more features were added: massaging and bidet features are common, newer ones have a little air fan for deodorizing,... play music, and light the inside of the bowl. Somewhere along the line, the original reason for the heater itself became less important — The Berkeley Blog