It may seem like a strange detail of Japan to discuss, but coin laundries here are slightly different than their American counterparts.
Most people in Japan don't own dryers. Instead, clothes are hung outside to dry. However, during the rainy season or when needing to dry something heavy like a futon it's nice to have another option. Coin laundries are therefore abundant in and around residential areas. They usually consist of far more dryers than washers, some of them very, very large. This place charged ¥100 for 10 minutes of drying time.
It also had an assortment of weekly manga collections on hand to read while you waited. There was a line of coin operated massage chairs as well. I only had enough clothes to last two of the three week trip we had planned, so it was nice to get them clean and dry quickly. If you ever find yourself in the same predicament in Japan, coin laundries are probably your best bet.