.mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}You can help expand this article with text translated from the corresponding article in Japanese. (April 2022) Click [show] for important translation instructions. View a machine-translated version of the Japanese article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Consider adding a topic to this template: there are already 3,794 articles in the main category, and specifying|topic= will aid in categorization. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Japanese Wikipedia article at [[:ja:十勝川]]; see its history for attribution. You should also add the template ((Translated|ja|十勝川)) to the talk page. For more guidance, see Wikipedia:Translation.

Tokachi River Tokachi-gawa, Tokapci
Iwamatsu Dam in Shimizu (September 2007)


Native name	十勝川 (Japanese) トカㇷ゚チ (Ainu)
Location
Country	Japan
State	Hokkaidō
Region	Tokachi
District	Kamikawa, Nakagawa
Municipalities	Shintoku, Toyokoro
Physical characteristics

Source
• location	Shintoku, Hokkaidō, Japan

Mouth	Pacific Ocean
• location	Toyokoro, Hokkaidō, Japan
• coordinates	42°41′42″N 143°39′58″E / 42.6950°N 143.6661°E / 42.6950; 143.6661
• elevation	0 m (0 ft)
Length	156 km (97 mi)^[1]
Basin size	9,010 km² (3,480 sq mi)^[1]

Discharge
• average	71 m³/s (2,500 cu ft/s)

Basin features
Population	340,000^[1]

Tokachi River (十勝川, Tokachi-gawa) is a river in Hokkaidō, Japan.

Etymology

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).

Although the exact origins of "tokapci" were unknown, Hidezo Yamada, an Ainu language researcher, proposed these origins:

tokap-usi ("breast, somewhere")
toka-o-pci ("swamp, around a place, either")

References

^ ^a ^b ^c 日本の川 - 北海道 - 十勝川 [Rivers of Japan - Hokkaidō - Tokachi River] (in Japanese). Water Management and Land Conservation Bureau, Ministry of Land, Infrastructure, Transport and Tourism. Archived from the original on 10 February 2024. Retrieved 10 February 2024.

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 Takase 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 Kita River Minami River
Kansai region	Choshi River Ibo River Kako River Kinokawa 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

Authority control databases
International	VIAF
National	Japan