Muroran City in Hokkaido boasts a beautiful night view that is recognized as one of the best nighttime views of factories in all of Japan. The night cruise allows you to enjoy the scenic display from the sea, including the lighting up of the Shiratori Bridge, the largest suspension bridge in Eastern Japan, the illuminated Surveyor Mountain, and the security lights illuminating all of the factories along the waterfront. They also offer dolphin and whale watching cruises, as well as pleasant tours of Cape Chikyu during the daytime from June to August.
Muroran Cruising
4 Chome-2-17 Etomocho, Muroran, Hokkaido
http://www.muro-nc.com/night_cruising.html