Koisan Sushi is a Japanese restaurant that has offered creative, fresh, and authentic Japanese cuisine at the heart of orange for 40 years. Illuminated by Japanese style lanterns and the walls adorned with specialized craftsman woodwork, Koisan is a time machine to ancient Japan. Koisan's dining experience can be approached one of two ways. Diners can request the dining room where the kitchen menus such as the Seafood Tokyo Udon Pasta, or the or Miso Black Cod Entrees are available; or request the sushi bar to order sushi and sashimi such as Toro (Bluefin Tuna Belly) or Tai (Sea Bream) a la carte with the help of our skilled chef Ken. The sushi bar is a coveted place for many regular customers, where beginners and pros are welcome alike. Koisan also offers a large selection of alcoholic beverages, specializing in Japanese Beer and Imported Sake - offered during Orange's best Happy Hour. Now offering $45 Omakase!Note*: Sushi Bar seating does not grant access to Kitchen Entrees.
