| 1．Iwase river |
| The Iwase River is a natural freshwater river located in Miyazaki prefecture in Kagoshima, Japan.[1] The watershed of the river is popular for the presence of numerous springs and waterfalls.[2][3][4] The river flows into the Oyodo River, which in turn flows to the Pacific Ocean. 31°56′14″N 131°09′12″E / 31.9372°N 131.1532°E / 31.9372; 131.1532 |
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| 2．Omono River |
| The Omono River (雄物川, Omono-gawa) is located in Akita Prefecture, Japan. The river flows from Mount Daisen on the border of Akita Prefecture with Miyagi and Yamagata Prefectures in the city of Yuzawa and drains into the Sea of Japan at the city of Akita. The river's drainage basin is essentially the entire southern half of Akita Prefecture. The river is free of dams for its entire length. It is regarded as a "first class river" in the Japanese river classification system.[1] |
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| 3．Koyoshi River |
| Koyoshi River (Japanese: 子吉川（こよしがわ）, Hepburn: koyoshigawa) is a river in Akita Prefecture, Japan. It originates from Mount Chōkai, where the border of Akita Prefecture and Yamagata Prefecture is located, and flows through Yurihonjō and finally into Sea of Japan. The headstream of the river is called Chōkai River (鳥海川, chōkaigawa).[1][2] It has the third largest drainage area of the class A rivers that flow through Akita Prefecture, after Omono River and Yoneshiro River.[4] |
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| 4．Yoneshiro River |
| The Yoneshiro River (米代川, Yoneshirogawa) is a river in Tōhoku region of the northern portion of the island of Honshū in Japan. It is 136 kilometres (85 mi) long and has a watershed of 4,100 square kilometres (1,600 sq mi).[1] The river rises from Mount Nakadake and Mount Shikakudake in the Ōu Mountains and Mount Hachimantai near the border of Akita Prefecture with Iwate and Aomori Prefectures, and flows to the west through northern Akita Prefecture into the Sea of Japan at Noshiro, Akita. |
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| 5．Hinokinai River Embankment |
| Hinokinai River Embankment (檜木内川堤, Hinokinaikawa zutsumi) is a nationally designated Place of Scenic Beauty in the city of Semboku, Akita Prefecture, Japan.[1] |
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