The section of the Shinetsu Line that runs near Ōmigawa Station in Niigata
goes the closest to the sea!
Did you know: A lot promotional items and posters that use pictures of a railway running by the sea do not use pictures of the Shinetsu Line. Shimonada Station in Shikoku
is used for these purposes, but it's not the closest, because there's a road in between the tracks and the sea!