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Otterhaus: Edogawa lock gate, Tokyo
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Otterhaus: Suzakiminami floodgate, Tokyo
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Otterhaus: Shibakawa floodgate, Kawaguchi
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Otterhaus: Unga(Canal) floodgate, Kashiwa
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Otterhaus: Ryoke floodgate, Kawaguchi
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Otterhaus: Kamaguchi floodgate, Okaya
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Otterhaus: Okanoshitagawa floodgate, Hiroshima
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Otterhaus: Hagiwara lock gate, Kamisu
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Otterhaus: Tonegawa estuary weir, Tohnosho
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Otterhaus: Kizugawa floodgate, Osaka
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Otterhaus: Shinotsu canal floodgate, Ebetsu
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Otterhaus: Maeslantkering, Rotterdam
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Otterhaus: Shinkawa floodgate, Narita
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Otterhaus: Otoegawa sluice gate, Fukagawa
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Otterhaus: Chikabumi headworks, Tohma
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Otterhaus: Shinryu headworks, Asahikawa
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Otterhaus: Obanegawa floodgate, Narita
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Otterhaus: Sakuraso floodgate, Asaka
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Otterhaus: Izurugawa floodgate, Sano
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Otterhaus: Imba floodgate, Sakae
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Otterhaus: Asaka floodgate, Asaka
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Otterhaus: Arakawa regulating reservoir No.1 floodgate, Toda
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Otterhaus: Gyotoku movable weir, Ichikawa
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Otterhaus: Floodwall gate, Makinohara
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Otterhaus: Drainage canal, Izunokuni
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Otterhaus: Hitachigawa lock gate, Tohnosho
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Otterhaus: Hitachigawa floodgate + lock gate, Tohnosho
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Otterhaus: Tonegawa estuary weir + lock gate, Tohnosho
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Otterhaus: Tonegawa estuary weir, Tohnosho
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Otterhaus: Kurobegawa lock gate, Tohnosho