Akasaka Sushi Koshikawa is an omakase sushi restaurant a 30-second walk from Exit 7 of Akasaka Station in Tokyo. The chef uses red vinegar or rice vinegar for the shari depending on the topping and adjusts its temperature, serving sushi such as chutoro, aori ika, uni, and anago along with seasonal dishes. It is open on weekday evenings and on Saturday for lunch and dinner, and reservations are made through Tabelog. Guests at the counter can watch the chef work up close, and there is also a fully private room.