[Obama] and Japanese Prime Minister Shinzo Abe dined at a legendary sushi restaurant... Chef Jiro Ono, 87, is considered to be one of the top sushi chefs in the world. Ono prepares the sushi himself. His recommended special course — which features a rare, endangered species of bluefin tuna — starts at about $300. It includes more than a dozen courses served in about 20 minutes.