The Gogyogawa Bridge, which spans the Mooka Railway, is a British-style pony-type pin truss (99 ft, pony), and is a valuable railway bridge from the early days of railways.
In addition, at the time when steel was a precious commodity, many of these bridges were converted from main line railways to local lines as locomotives became larger, and these two bridges were also converted and relocated from main lines. The nameplate on the Kogaigawa Bridge confirms that it was manufactured by Patent Shaft & Axletree in 1894. There is no nameplate on the Gogyogawa Bridge, but it is said to have been manufactured at the same time as the Kogaigawa Bridge.
These two bridges are the oldest pony Warren trusses still in use, and together with the brick piers made with English bond, they are valuable local historical heritage that convey the atmosphere of the early days of Japan's railways to the present day.