Today, thanks to Yelp.com I discovered a new one, called "Hana". It's considerably smaller and doesn't have a prepared foods section, but it has all the basics and at much better prices than Daruma. The owners are very nice and I will definitely be a repeat customer.
It's located at 2004 17th Street NW, in the U St Corridor of DC.
While I was there, I discovered this thing called "Cream Bread", this particular one being made by a company called "D-Plus". I tried the Hokkaido Cream flavor, and it is the truth. Go buy some.