This doesn’t answer the OP’s question, but thought it might help someone else.

Apart from the time I lived above a coin laundery (sure it isn’t ra-ndori? ) my experience with launderettes is tied in with Sento (public bath) visits as they often have them attached, or even inside the changing room – certainly in many women’s changing areas. So I wash myself and my clothes at the same time.

Wonderful arrangement!