The Noto Hanto (Noto Peninsula) is Japan's largest - a long arm extended into the Japan Sea coast between Kanazawa and Toyama. This is Ishikawa Prefecture, one of Japan's most rural, and that guarantees you a wealth of great seascapes and quiet farmland interiors. The enormous length of the coast means that it will take you a full three days to get around it -- and you'd better make that four days if you want to explore every nook and cranny of the coastline.
You can do this route in either of two very different ways: solo (or with a small group of friends) as usual, or with hundreds if not thousands of other cyclists as part of the annual Tour de Noto in September. Either way, it's one of the better ways to experience the beauty that Japan's coastline has to offer.