Well Canada has 9.8 million square miles, varied terrain, and wide roads. France is still one of the most beautiful countries.
It really isn't as great as you might expect for cycling - except in Quebec, the roads are often quite straight and boring, the drivers really aren't used to cyclists - the half-asleep long-distance truck drivers are a serious problem - and there really isn't the range of quiet backroads, and it's so big that it takes you ages to get to any of the decent cycling. BC is excellent for mountain biking, though.
Japan is surprisingly good once you are out of the Tokyo megalopolis, and even cycling in Tokyo is a lot of fun. The narrowness, volcanicity and high culinary standards of the country means you are never far from a fantastic climb, a good meal and a hot-spring - the perfect combination for me. But France is awesome, in fact the whole belt from northern Spain through southern France and across Northern Italy is unbeatable IMHO.