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Ibo River
Ibo River Tatsuno Hyogo01n4272.jpg
Ibo River in 2010
Physical characteristics
SourceMount Fujinashi
 • elevation1,139 m (3,737 ft)
MouthHarima Sea
 • coordinates
34°46′10″N 134°35′07″E / 34.7694°N 134.5854°E / 34.7694; 134.5854Coordinates: 34°46′10″N 134°35′07″E / 34.7694°N 134.5854°E / 34.7694; 134.5854
Length69.736 km (43.332 mi)
Basin size810 km2 (310 sq mi)

The Ibo River (揖保川) is a river in Hyōgo Prefecture, Japan.[1] The Ibo, Kako, Ichi, Yumesaki, and Chikusa rivers are collectively referred to as the Harima Gokawa, the five major rivers that flow into the Harima Sea. The basin area is the second largest of the Harima Gokawa after the Kako River.


The river originates from Mt. Fujinashi (elevation 1,139m) in Shisō, Hyōgo, and flows southward. It runs through Tatsuno and divides Nakagawa to the west near Yobeku, Himeji, forming a delta.

On the embankment in Tatsuno City, there is an area where tatami mats are used to raise the revetment by using the tatami mats when the water level rises.


On September 13, 1976, a landslide occurred in Fukuchi, Ichinomiya-cho due to the torrential rain of Typhoon Fran. The spilled earth and sand filled the river channel and caused flooding.[2]


  1. ^[bare URL PDF]
  2. ^ 三階校舎ひとのみ 救助隊、手つけられず『朝日新聞』1976年(昭和51年)9月14日朝刊、13版、23面