Hijikawa Arashi is a rare natural phenomenon in the world in which fog that forms in Ozu Basin upstream flows along Hiji River River into the estuary on a sunny morning, accompanied by strong winds. The strong winds blow through in undulations, and at times the fog can reach several kilometers offshore, with wind speeds of over 10 meters near the river mouth.

As a winter feature, it usually occurs from around October to around March of the following year, but it cannot be seen unless various conditions are met. If there is no land breeze, you can enjoy the view as Sea of clouds, but when you see the mist moving along the river and undulating into the estuary, it becomes a mystical sight, resembling a white dragon.

It is a valuable phenomenon that is difficult to see, but it can be referred to by the "Hijikawa Arashi Forecast Meeting" by local residents. In addition, you can enjoy the view with "Hijikawa Arashi Observation Koen (Park)" and "Nagahama Bridge" as a view spot.