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Dams, Canals Chubu Area

Iwaya Dam

Selected 100 ReservoirBy BusBy TrainBy Car
Purpose FAWIP *See more -> the functions of the dam
Location Gero City, Gifu Pref. *See more
River Maze River, Kiso River System
Type Rockfill dam
Gate Radial gate:2
Dam Height(m) 128
Crest Length(m) 366
Total Storage
Completion 1976
Details Iwaya Dam has a ski jumping-type spillway. As to the design of the spillway, hydraulic model experiment was conducted and formation of water cushion was confirmed through the design calculation and the hydraulic model experiment.


6-27 Unohara, Kanayama-cho, Gero City, Gifu Pref.
Phone No.


Apprx. 25 min. by car from Hida-Kanayama Sta. of JR Takayama Main Line
Apprx. 60 min. from Gujo-Hachiman IC of Tokai-Hokuriku Expressway
Apprx. 60 min. from Tomikaseki IC of Tokai-Kanjo Expressway

Dam Card

Dam Card
Dam Card

Tourist Spots

Gero Hot Springs
Gero Hot SpringsGero Hot Springs resort is well known as one of the three renowned hot springs in Japan and attracts many hot spring fans from all over Japan. 80 degree hot water has been pouring out from the sources and distributed to the hotels and Japanese style inns, etc. Many tourists appreciate cosy atmosphere in addition to the smooth skin they can get with hot baths bathing.
Photo by "Gero Onsen Official Website" HP
See more ->Gero Onsen Official Website
Gujo Hachiman of Gujo City and Gujo Hachiman Castle
Gujo Hachiman of Gujo City and Gujo Hachiman CastleAbout half an hour drive from Iwaya Dam, there is an authentic small town named Gujo Hachiman. As its English website states you can have an experience of a visit to an "off the beaten path" town. Central part of the town was is designated as an Important Preservation District for Groups of HIstoric Buildings. When you walk through the street, you will easily find many water water containers with affluent water is pouring into and water fountains directly. Gujyo Hachiman Castle is one of the must to see sites for tourists. The castle tower was reconstructed but its main structure is of woods and from there you could see the town and surrounding forest.
Photo by "Gujo Hachiman Tourism Association" HP
See more ->Gujo Hachiman Tourism Association
Gujo Tourism Federation

Gourmet Information

Iwaya Dam Curry and Rice
Iwaya Dam Curry and Rice
Green Dam Curry and Rice
Green Dam Curry and Rice


Coming soon