Good japanese food + reasonable priced = YUME
One of the most amazing japanese restaurants in Europe I found is the YUME in Vienna.
Freshness and taste are great, combined with a fit and proper interior, crowned by a pleasant and competent team it leads to a nice evening every time you are hitting the place.
In the evening (every evening!) the YUME is well-filled, so a reservation could be helpfull.
This tip has the address "Bergmillergasse 3, 1140 Wien (Hütteldorf)"