[Japan Water Agency / JWA] Water resources development of seven river systems.

[Japan Water Agency / JWA] Water resources development of seven river systems.

Dams, Canals Northern Kyushu Area

Oyama Dam

Dam Card
Tourist Spots
Gourmet Information
AwardBy BusBy TrainBy Car
Purpose FNW *See more -> the functions of the dam
Location Hita City, Oita Pref. *See more
River Akaishi River, Chikugo River System
Type Concrete gravity dam
Gate Gateless
Dam Height(m) 94
Crest Length(m) 370
Total Storage
Completion 2013
Details The advanced technical proposal type of comprehensive bidding evaluation method was applied for the construction of Oyama Dam for the first time in Japan. As a result of full consideration of the geographical and geological condition at the construction site and adoption of the economical and rational design, the slope of dam body on the downstream side became steep (1:0.66). The energy dissipator located by the side of the channel, utilizing the level ground of former settlement is also unique.


Hita City, Oita Pref.
Phone No.
*Kyusyu Regional Office


Get off at Hita sta. of JR Kyudai Main Line
Approx.20 min. from Oita Exptressway Hita IC

Dam Card

Dam Card1
Dam Card2


Tourist Spots

Hita City
Hita CityHita City is one of the many famous tourist destinations in Kyushu. With the cosy old shopping town atmosphere, central shopping area of Hita attract many people to come to this town, especially Mameda area of the city, for shopping souvenirs. As the porcelain Village of Onta-yaki is close, many Onta-yaki porcelain tableware shops are located on the above street, welcoming visitors. (Similar surface decoration method is used as Koishibara-yaki porcelain wares.)
Photo by "Hita City's Official Sightseeing Information Site ´OIDE HITA.com´" HP
See more ->Hita City's Official Sightseeing Information Site "OIDE HITA.com"


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