Hijikawa arashi is a very cool winter sight.
It is the climatic phenomenon occuring
only on Hiji River around Ohzu city in the world.
Ohzu city is on the bottom of a basin,
and it has often fog in the morning in winter.
Hiji River forms a valley to the mouth,
so the fog flows down the distance over 15 km long along the river.
The speed reaches over 15 km per hour at the mouth.