The Golden Giant burger, costing 100,000 JPY or close to $1,000 went on sale in Tokyo this year to celebrate the reign of the new emperor. It's filled with wagyu beef, a 1 kilo patty, foie gras, lettuce, tomato, garlic saffron sauce, cheddar and in a gold leaf bun. But is it any good? We went to the Oak Door steakhouse at the Grand Hyatt in Tokyo's fashionable Roppongi Hills to find out.