Slip off your shoes and step inside one of the tatami rooms or pull up a chair at the sushi bar at this unassuming but outstanding downtown Japanese restaurant. So ordinary looking it barely stands out among the office towers near Keller Auditorium, the restaurant draws a crowd of locals, foodies, and Japanese businesspeople who savor the sushi, sashimi, tempura, hamachi, and teriyaki. Grilled salmon cheeks stand out among many seafood specialties.