Sushi savants know that otoro is the supremely rich tuna belly, but in Hayes Valley it is a petite sushi spot drawing crowds of loving locals. Slate blue tones and wood accents show a contemporary aesthetic, while white porcelain dishes, windowed walls, and perky spotlights lend a splash of cheer. The sushi counter overflows with fresh, flavorful options, but steaming udon bowls are best for those who like to get their slurp on. Daily specials merit serious attention and reveal such silky nigiri as buttery walu and melt-in-your-mouth otoro. Takashi rolls wrapped with albacore slices and filled with crispy pumpkin pieces, or the perfect little otoro maki packed with spicy tuna and crowned with mango slices are other favorites from the ample menu.