Omachi in Japan awaits visitors! Discover the attractions, activities and accommodation in Omachi. The nearest major city to Omachi is Nagaoka. Take a short trip from Omachi and set some time aside to explore the Nagaoka. Dotted with places like Echigo Hillside Park, Admiral Isoroku Yamamoto Memorial Museum, Ao-re Nagaoka; it will definitely be a good idea. Popular vacation packages of Omachi are of 1-2 days.