Japan's Great Seto Bridge (Seto Ohashi) seen lit at night. This is a tower on the Kita Bisan-Seto section seen from Yoshima Island. The Great Seto Bridge is a series of connected bridges from Honshu to Shikoku, connecting Okayama and Kagawa prefectures. It is a double-decked system which carries both rail and road traffic. It is 13.1 kilometers long.