| 1．Anano River |
| Anano River (穴の川, Ana-no-kawa) is a river located in the Minami-ku Ishiyama area of southern Sapporo in Hokkaidō, Japan.[1] It is a tributary of the Toyohira River[2] and classified as class A river.[3] It is 9.4 km long and has a catchment area of 8.9 km2.[4] The Sapporo River Work Office built a sand control dam on the Anano River with a sand-retarding basin.[4] |
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| 2．Sōsei River |
| The Sōsei River is a man-made river that runs through the center of Sapporo City, Hokkaidō, Japan. It was built under the supervision of Otomo Kametaro in the late 1860s, and was one of the first things constructed on the city site. When it was built, the river ran in a straight line to the Ishikari River. It is the dividing point between east and west in Sapporo's grid-based address system.[1] |
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| 3．Makomanai River |
| Makomanai River (真駒内川, Makomanai-gawa) is a tributary of the Toyohira River in Sapporo, Hokkaidō, Japan. It has a length of 21 kilometres (13 mi) and has a watershed of 37 square kilometres (14 sq mi). Flowing from Bankei Pond (万計沼, Bankei Numa) in the mountains, the Makomanai River's upper course is called Bankei River (万計沢川, Bankeisawa-gawa), too. Its middle course flows through a narrow valley about 200 metres (660 ft) wide in the Tokiwa (常盤) area. Running north, it merges with the Toyohira River at Makomanai area. The Toyohira River flows through the Sapporo city's center. Makomanai means rear river in the Ainu language.[1] |
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| 4．Zenibako River |
| The Zenibako River (銭函川) runs from Otaru, Hokkaidō, Hokkaidō, Japan and ends in the Sea of Japan. It is a Normal Class River of the Zenibako River System under Japanese River Law. The Zenibako River originates north of Mount Okuteine, near the border with Sapporo City. It runs through mountain woods and meets the Zenibako-tōge River (銭函峠川) as it emerges from the Zenibako Mountain Pass (銭函峠, Zenibako Tōge). Katsuraoka-machi (桂岡町, Katsuraoka Town) is situated around the left bank of its middle course. The river turns eastward where it passes under the Sasson Expressway and National Route 5. It runs through the urban area of Zenibako, turns north, then enters the Ishikari Bay 200 meters southwest of Zenibako Station. The course lower than Route 5 was consolidated with concrete after the 1962 flood. |
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| 5．Kushiro River |
| Kushiro River (釧路川, Kushiro-gawa) is a river in Hokkaidō, Japan. It is 154 kilometers (96 mi) in length and has a drainage area of 2,510 square kilometers (970 sq mi). The Kushiro originates from Lake Kussharo and flows south across the Kushiro Plain. The river is joined by two tributaries, the Kuchoro River (60.2 kilometres (37.4 mi)) and the Setsuri River (59.8 kilometres (37.2 mi)), before it empties into the Pacific Ocean at the port at Kushiro. The lower reaches of the river form broad wetlands. The Shinkushiro River (13 kilometres (8.1 mi)), which was built roughly parallel to the Kushiro River, was completed in 1931 and flows south to the Pacific Ocean.[1][2][3][4][5] |
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| 6．Yūbari River |
| Yūbari River (夕張川, Yūbari-gawa) is a river in Hokkaidō, Japan. It is the namesake of Imperial Japanese Navy cruiser Yūbari. |
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| 7．Abashiri River |
| Abashiri River (網走川, Abashiri-gawa) is a Class A river in Hokkaidō, Japan.[1] |
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| 8．Rumoi River |
| Rumoi River (留萌川, Rumoi-gawa) is a river in Hokkaidō, Japan. The Rumoi is 44 kilometres (27 mi) in length. It traces its source to Mount Poroshiri 731 metres (2,398 ft) in the Hidaka Mountain range, and flows across Rumoi Subprefecture in the west of Hokkaidō and empties into the Sea of Japan. The mouth of the Rumoi River is in the city of Rumoi.[1] |
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| 9．Koetoi River |
| Koetoi River (声問川, Koetoi-gawa) is a river in Hokkaidō, Japan.[1] |
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| 10．Tatsuushi River |
| Tatsuushi (立牛川, Tatsuushi-gawa) is a river in Hokkaidō, Japan. The river rises on the slopes of Kitami Fuji in the Kitami Mountains. It flows 33 km in a northerly direction until it flows into the Shokotsu River.[1] |
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| 11．Teshio River |
| The Teshio River (天塩川, Teshio-gawa) is a river in Hokkaidō, Japan. At 256 kilometres (159 mi), it is the second-longest river on the island (after the Ishikari) and the fourth-longest in the country (after the Shinano, Tone, and Ishikari).[2] A Class A river, the Teshio is the northernmost major river in Japan, and has been designated Hokkaidō Heritage.[2][3][4] Matsuura Takeshirō is said to have come up with the name "Hokkaidō" during his exploration of the river's interior.[5] |
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| 12．Chitose River |
| Chitose River (千歳川, Chitose-gawa) is a river in Hokkaidō, Japan. The river is a class A river. In the city of Ebetsu, the river is sometimes known as Ebetsu River (江別川, Ebetsu-gawa). In the Ainu language Chitose was originally called shikot, meaning big depression or hollow, like Lake Shikotsu a caldera lake. To the Japanese, this sounded too much like dead bones (死骨, shikotsu), so it was changed to Chitose.[1] The name of the river was changed in 1805.[2] |
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| 13．Shiribetsu River |
| Shiribetsu River (尻別川, Shiribetsu-gawa) is a river in Hokkaidō, Japan. |
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| 14．Ishikari River |
| The Ishikari River (石狩川, Ishikari-gawa), at 268 kilometres (167 mi)[1] long, is the third longest in Japan and the longest in Hokkaidō. The river drains an area of 14,330 square kilometres (5,530 sq mi),[1] making it the second largest in Japan, with a total discharge of around 14.8 cubic kilometres (3.6 cu mi) per year. |
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| 15．Shiribeshi-Toshibetsu River |
| The Shiribeshi-Toshibetsu River (後志利別川, Shiribeshi-Toshibetsu-gawa) is a Class A river in Hokkaidō, Japan. It flows through Hiyama District, and empties into the Sea of Japan.[1] It is the only Class A river in Southern Hokkaidō, and thus is considered to be extremely important for agriculture and flood control.[2] |
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| 16．Mu River (Hokkaidō) |
| Mu River (鵡川, Mu-kawa) is a river in Hokkaido, Japan. Located in Kamikawa and Iburi subprefectures, it is one of 13 Class A rivers on the island. |
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| 17．Tokoro River |
| Tokoro River (常呂川, Tokoro-gawa) is a river in Hokkaidō, Japan. The Tokoro River, which has its source in Mt. Mikuni (alt. 1,541 m), flows through Oketo and Kunneppu towns and into the Sea of Okhotsk from Kitami City.[1] Many white-tailed eagles and Steller’s sea eagles that have been designated as protected species by the national government are observed in its basin. A colony of purple azalea designated as a natural monument by the Hokkaido government and a forest of large-diameter Japanese elm trees along the Muka River, which flows parallel to the Tokoro River, are symbols of the region. At the Tokoro River Estuary Site, relics, remains of pit-dwellings and tomb pits from the Jomon era have been found.[2] |
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| 18．Yūbetsu River |
| Yūbetsu River (湧別川, Yūbetsu-gawa) is a river in Hokkaidō, Japan. As of 2005, some 34,000 people live in its watershed of 1,480 square kilometres (570 sq mi).[1] Yūbetsu River rises in the Kitami Mountains on the slopes of Mount Tengu.[1] The river travels some 87 kilometres (54 mi) to the Sea of Okhotsk.[1] |
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| 19．Shokotsu River |
| Shokotsu River (渚滑川, Shokotsu-gawa) is a river in Hokkaidō, Japan. It is designated a Class A river by the Ministry of Land, Infrastructure, Transport and Tourism. |
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| 20．Shikiu River |
| Shikiu River (敷生川, Shikiu-gawa) is a river in Hokkaido region of Japan originating from the Orofure mountain range and draining to the Pacific Ocean.[1][2][3] 42°29′54″N 141°16′25″E / 42.49839°N 141.27372°E / 42.49839; 141.27372 |
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| 21．Saru River |
| Saru River (沙流川, Saru-gawa) is a river in Hokkaidō, Japan. The Saru River rises in the Hidaka Mountains and empties into the Pacific. It is considered sacred in traditional Ainu beliefs.[4] The Nibutani Dam is situated on the Saru River, at Nibutani village. The construction of this dam was the subject of famous domestic litigation, producing the first ever Japanese legal decision to recognise the Ainu people as an indigenous people. Construction of a second dam, the Biratori Dam is also planned by the Hokkaido Development Board.[5] The 'Cultural Landscape along the Saru River resulting from Ainu Tradition and Modern Settlement' has been designated an Important Cultural Landscape.[6] |
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| 22．Niikappu River |
| Niikappu River (新冠川, Niikappu-gawa) is a river in Hokkaidō, Japan. The Niikappu River flows south to southwest from Mount Poroshiri[1] in the Hidaka Mountains. The river flows through four dams, including Niikappu Dam and Okuniikappu Dam. Both dams are owned by the Hokkaido Electric Power Company, Inc.[2] The dams form Lake Niikappu and Lake Poroshiri, respectively. After 80 kilometres (50 mi),[3] the river empties into the Pacific Ocean.[4] |
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| 23．Shizunai River |
| Shizunai River (静内川, Shizunai-gawa) is a river in Shinhidaka, Hokkaidō, Japan. The Shizunai River drains from the Hidaka Mountains into the Pacific Ocean. |
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| 24．Mitsuishi River |
| Mitsuishi River (三石川, Mitsuishi-gawa) is a river in Hokkaido, Japan. It is 31.6 kilometers (19.6 mi) in length and has a drainage area of 159.4 square kilometers (61.5 sq mi).[1] |
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| 25．Tokachi River |
| Tokachi River (十勝川, Tokachi-gawa) is a river in Hokkaidō, Japan. In 1820, the explorer Takeshiro Matsuura (松浦 武四郎) proposed "Tokachi" as the name of the surrounding Tokachi Province, with each character corresponding to a Japanese homophone. The province was named after this river, which in turn was derived from the Ainu language word "tokapci" (トカㇷ゚チ). |
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| 26．Shibetsu River |
| Shibetsu River (標津川, Shibetsu Gawa) is a river in Hokkaidō, Japan. It originates from Mount Shibetsu and flows through Nakashibetsu and Shibetsu into the Sea of Okhotsk.[1] |
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