The staff greets you in unison, sings along to karaoke, and otherwise entertains patrons at this longstanding sushi joint near the Hotel Boulderado. But the zany antics of the employees are no distraction—the sushi rolls (many of which draw inspiration from the Rockies or Boulder's tie-dye-tinged culture), tempura, and noodle dishes are uniformly first-rate. You'll find a traditional Japanese izakaya at the sister restaurant, Amu ([tel] 303/440-0807; www.izakayamu.com), located just one door to the west.