Ajisen strikes you as special before you even walk in the door. Great care has been taken in creating the entrance itself -- a good sign of the good things to come.
The entrance is very atypical of a sake pub. Instead of the usual sliding door and rope curtain, there is a very artsy-craftsy stained-glass sign, with a reassuring wooden sake barrel in the corner. The inside is remarkably small and compact, with a tight counter for seven and tables for 14 beyond that.
Settling in with an Ebisu draft (another very good sign), you may be courteously warned that most things may take a moment or two longer to prepare than the average place. No problem. You should be happy to be camped here for the duration.