Intimate sushi restaurant with dedicated regulars dishes up superb sushi.. A petite jewel-box of a restaurant, this Japantown joint is treasured for its exquisitely fresh fish. The chef cooks and prepares everything himself, not impossible since the restaurant only seats 12, with the most coveted spots at the five-seat sushi bar. Indulge in the omakase dinner ($42), a six-course menu left to the chef's whim; it includes a sashimi course, nigiri, soup and a cooked fish dish.…