A rarity in these parts, and a mere 45 minute walk from home.

I don't know what makes it a "California Style" laundromat as claimed, but I'll take it. Coin-op machines are Y400, including auto-dispensed soap, and Y100 per ten minutes of drying time. They'll also do home pick up and drop off service. It costs 2800 yen plus a 1000 yen sign up fee, but includes nifty looking laundry bags - including a mesh bag for your undies that they just stay in throughout the laundry process to "protect your privacy." They've also got tons of magazines, including a few American gossip mags. Viva Yoyogi Wash and Fold!