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Toyohira River
The Toyohira River at Jōzankei
Native name	豊平川 (Japanese)
Location
Country	Japan
State	Hokkaidō
Physical characteristics

Source	Oizaridake (小漁岳)
• location	Sapporo, Hokkaidō, Japan
• coordinates	42°47′31″N 141°13′0″E / 42.79194°N 141.21667°E / 42.79194; 141.21667
• elevation	850 m (2,790 ft)

Mouth	Ishikari River
• location	Sapporo and Ebetsu, Hokkaidō, Japan
• coordinates	43°9′4″N 141°26′58″E / 43.15111°N 141.44944°E / 43.15111; 141.44944
• elevation	2 m (6 ft 7 in)
Length	72.5 km (45.0 mi)
Basin size	894.7 km² (345.4 sq mi)
^[1]

The Toyohira River (豊平川, Toyohira-gawa) is a river in Hokkaidō prefecture, Japan. It is 72.5 km in length and has drainage area of 894.7 km².^[2] It is a tributary of the Ishikari River.

It supplies water to Sapporo city, the capital of Hokkaidō built on the alluvial fan formed by the river. Jōzankei is a popular attraction with onsen (hot springs) along the upper Toyohira.

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Course

From the mountain Oizaridake, the Toyohira River flows northwards into Lake Jōzan (定山湖, Jōzan-ko). The Hōheikyō Dam (豊平峡ダム, Hōhei-kyō Damu) created the lake. The river runs through the gorge. After exiting the gorge it is joined by several more rivers before turning East. Two smaller dams block the course of the Toyohira as it moves into the suburbs of Sapporo. The river flows north and east through the middle of the Toyohira Ward of Sapporo. As it leaves the urban area it forms the border between Sapporo and Ebetsu before emptying into the Ishikari River.^[3]

History

The Ainu knew this river as Sapporo Pet (Sapporo River). Toyopira was originally the name of a crossing point of the Sapporo River. Until the 19th century, the lower course of the Sapporo River had been the same as the Fushiko River of today, emptying into the Ishikari River directly to the north. After a flood, the river made a new course to the east. The Ainu called the remains of this old lower course of the Sapporo River Fushiko Sapporo or Old Sapporo.

When the Japanese colonized the area, they used Ainu place names. They named the new capital city after the river Sapporo and named the Sapporo River (Sapporo Pet) after the crossing point Toyohira. The old lower course of the Fushiko Sapporo was named Fushiko River (伏籠川, Fushiko Kawa). The Toyohira Bridge was built at the crossing point named Toyopira by the Ainu.

Tributaries

References

^ Source Geographical Survey Institute topographical map 漁岳(札幌).
^ Sung Gi Hu (2010). Makoto Taniguchi, Ian P. Holman (ed.). Study on the relation between groundwater and surface water in Toyohiro-gawa alluvial fan, Hokkaido, Japan. Groundwater response to changing climate. Vol. 16. Boca Raton: CRC Press. p. 141. ISBN 978-0-203-85283-5.
^ 地図閲覧サービス 2万5千分1 (in Japanese). Geographical Survey Institute. Archived from the original on 2011-05-27. Retrieved 2009-04-30.

River systems and rivers of Japan

Rivers of Hokkaido

Sea of Japan	Ishikari River Chitose River Toyohira River Makomanai River Anano River Yūbari River Koetoi River Rumoi River Shiribeshi-Toshibetsu River Shiribetsu River Teshio River Zenibako River
Sea of Okhotsk	Abashiri River Shibetsu River Shokotsu River Tokoro River Yūbetsu River
Pacific Ocean	Akan River Kushiro River Mitsuishi River Mu River Niikappu River Saru River Shizunai River Tokachi River
Rivers of Hokkaido on Commons

Rivers of Honshu

Tōhoku region	Abukuma River Arakawa River Iwaki River Kitakami River Komagome River Koyoshi River Mabechi River Mogami River Natori River Ōhata River Oirase River Omono River Yoneshiro River
Kantō region	Arakawa River Edo River Fuji River Kanda River Kuji River Naka River Sagami River Sumida River Tama River Tone River Tsurumi River
Chūbu region	Agano River Shinano River Seki River Hime River Kurobe River Jōganji River Jinzū River Shō River Oyabe River Tedori River Kuzuryū River Fuji River Abe River Ōi River Sakawa River Tenryū River Toyo River Yahagi River Shōnai River Kiso Three Rivers Kiso River Nagara River Ibi River Kushida River Miya River
Kansai region	Choshi River Ibo River Kako River Kinokawa River Kita River Kumano River Kuzuryu River Maruyama River Muko River Yamato River Yodo River Yasu River Katsura River Kamo River Kizu River Dōton River Yura River
Chūgoku region	Asahi River Ashida River Gōnokawa River Hino River Hii River Ōta River Oze River Saba River Sendai River Takahashi River Takatsu River Tenjin River Yoshii River

Rivers of Shikoku

Aibiki River
Shimanto River
Shinmachi River
- Suketō River
- Tamiya River
- Sako River
- Sumiyoshijima River
Yoshino River
- Dōzan River

Rivers of Kyushu

Kyushu	Arie River Chikugo River Kikuchi River Kuma River Mimi River Ōno River Ōyodo River
Yaeyama Islands	Kokuba River Nakama River Urauchi River

Rivers of Japan Category
Rivers of Japan on Commons

International

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Toyohira River

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