The Korean employee Y san at P's office helped me with the cleaner's. She is soooo helpful i dont know what i would do without her. She took me to a small shop where they charge by weight of the laundry we bring. Mine was 10000 won (700 yen). They are not dry cleaners. They just wash everything for us. It takes a few days before i can pick them up, so i really have to plan how much clean clothes i should have available. The lady there was really nice, but still i am uncomfortable giving them my underwear. i will wash them myself. i went to daiso afterwards to get a laundry hanger.
I think i will also try the coin operated laundromat i found on the internet. its a bit far, but when i want clean clothes fast, thats much more convenient than using the cleaners.
The place i went a few days ago apparently is a "top class" laundry place. Y san said that on their window it says they use the top notch cleaning technology from japan (lol). I had no idea. Maybe that's why the clerk spoke japanese. We will see how P's clothes turn out with the technology from home.