Minamoto Kitchoan is a much-loved shop for wagashi, the sweets traditionally served during the Japanese tea ceremony. I passed by their sign on Market Street today, on the even-numbered side near Kearny (or was it Montgomery?). Workers renovating said the shop plans to open Friday or Saturday.
I believe this would be Minamoto Kitchoan's second location in the U.S., after one in New York.
See previous post on the dearth of wagashi in SF: http://chowhound.chow.com/topics/339336 .