This spot offers a stunning view, with panoramic sights of the river below and a train bridge stretching across the landscape.
To reach the bridge, go down a set of blue-painted stairs located to the right of Unazuki train station. Here is the Google Street View link, where you can see the train station on the left and the stairs you need to take on the right.
From the bridge, you can also reach the Unazuki Dam Observation Deck (Rexby link). After crossing the bridge, turn right and walk through a tunnel; in about 10 minutes, you’ll arrive at the observation deck.