The is a river in the

Kantō region The is a geographical area of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures: Gunma, Tochigi, Ibaraki, Saitama, Tokyo, Chiba and Kanagawa. Sl ...

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the n ...

. It is in length (the second longest in Japan after the Shinano) and has a drainage area of (the largest in Japan). It is nicknamed Bandō Tarō (); ''Bandō'' is an obsolete alias of the

Kantō Region The is a geographical area of Honshu, the largest island of Japan. In a common definition, the region includes the Greater Tokyo Area and encompasses seven prefectures: Gunma, Tochigi, Ibaraki, Saitama, Tokyo, Chiba and Kanagawa. Sl ...

, and ''Tarō'' is a popular given name for an oldest son. It is regarded as one of the "Three Greatest Rivers" of Japan, the others being the Yoshino in Shikoku and the Chikugo in

Kyūshū is the third-largest island of Japan's five main islands and the most southerly of the four largest islands ( i.e. excluding Okinawa). In the past, it has been known as , and . The historical regional name referred to Kyushu and its surround ...

Geography

The source of the Tone River is at () () in the Echigo Mountains, which straddle the border between Gunma and Niigata Prefectures in Jōshin'etsu Kōgen National Park. The Tone gathers tributaries and pours into the

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean (or, depending on definition, to Antarctica) in the south, and is bounded by the conti ...

at Cape Inubō, Choshi in

Chiba Prefecture is a prefecture of Japan located in the Kantō region of Honshu. Chiba Prefecture has a population of 6,278,060 (1 June 2019) and has a geographic area of . Chiba Prefecture borders Ibaraki Prefecture to the north, Saitama Prefecture to t ...

Tributaries

Major tributaries of the Tone River include the Agatsuma, Watarase, Kinu,

Omoi "Omoi" is the first single of Japanese singer and voice actress Voice acting is the art of performing voice-overs to present a character or provide information to an audience. Performers are called voice actors/actresses, voice artists, dubbi ...

, and the . The Edo River branches away from the river and flows into

Tokyo Bay is a bay located in the southern Kantō region of Japan, and spans the coasts of Tokyo, Kanagawa Prefecture, and Chiba Prefecture. Tokyo Bay is connected to the Pacific Ocean by the Uraga Channel. The Tokyo Bay region is both the most populou ...

History

The Tone River was once known for its uncontrollable nature, and its route changed whenever floods occurred. It is hard to trace its ancient route, but it originally flowed into

along the route of the present-day Edo River, and tributaries like the Watarase and Kinu had independent river systems. For the sake of water transportation and flood control, extensive construction began in the 17th century during the

Tokugawa shogunate The Tokugawa shogunate (, Japanese 徳川幕府 ''Tokugawa bakufu''), also known as the , was the military government of Japan during the Edo period from 1603 to 1868. Nussbaum, Louis-Frédéric. (2005)"''Tokugawa-jidai''"in ''Japan Encyclopedia ...

, when the Kantō region became the political center of Japan. The course of the river was significantly changed, and the present route of the river was determined during the

Meiji period The is an era of Japanese history that extended from October 23, 1868 to July 30, 1912. The Meiji era was the first half of the Empire of Japan, when the Japanese people moved from being an isolated feudal society at risk of colonization ...

, with the assistance of Dutch civil engineer Anthonie Rouwenhorst Mulder. Its vast watershed is thus largely artificial. Two ships of the

Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender ...

were named after the river,

one 1 (one, unit, unity) is a number representing a single or the only entity. 1 is also a numerical digit and represents a single unit of counting or measurement. For example, a line segment of ''unit length'' is a line segment of length 1. I ...

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was List of wars and anthropogenic disasters by death toll, one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, ...

vintage and another from

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the World War II by country, vast majority of the world's countries—including all of the great power ...

, the lead ship of its class.

Fukushima Daiichi nuclear disaster

As a result of the Fukushima Daiichi nuclear disaster radioactive cesium concentrations of 110 becquerels per kilogram were found in silver crucian carp fish caught in the Tone River in April 2012. The river is from the Fukushima Daiichi Plant. Six fishery cooperatives and 10 towns along the river were asked to stop all shipments of fish caught in the Tone.

Use

The Tone River was an indispensable inland water link between the capitol at

Edo Edo ( ja, , , "bay-entrance" or "estuary"), also romanized as Jedo, Yedo or Yeddo, is the former name of Tokyo. Edo, formerly a ''jōkamachi'' (castle town) centered on Edo Castle located in Musashi Province, became the ''de facto'' capital of ...

, and later Tokyo, to the Pacific Ocean. It carried not only local products like soy sauce from Choshi, but also products from the

Tōhoku region The , Northeast region, or consists of the northeastern portion of Honshu, the largest island of Japan. This traditional region consists of six prefectures (''ken''): Akita, Aomori, Fukushima, Iwate, Miyagi, and Yamagata. Tōhoku reta ...

, in order to save time and to avoid risk in the open sea. With the advent of the

railway Rail transport (also known as train transport) is a means of transport that transfers passengers and goods on wheeled vehicles running on rails, which are incorporated in tracks. In contrast to road transport, where the vehicles run on a p ...

in the 19th century major shipping on the Tone quickly declined, and inland ports such as Noda, Sekiyado, now part of Noda,

Nagareyama Nagareyama City Hall is a city located in Chiba Prefecture, Japan. , the city had an estimated population of 200,136 in 84,800 households and a population density of 5,700 persons per km2. The total area of the city is . Geography Nagareyama ...

, and Sawara, now part of Katori diminished in importance. Today the river has several dams that supply water for more than 30 million inhabitants of metropolitan

Tokyo Tokyo (; ja, 東京, , ), officially the Tokyo Metropolis ( ja, 東京都, label=none, ), is the capital and largest city of Japan. Formerly known as Edo, its metropolitan area () is the most populous in the world, with an estimated 37.46 ...

and large-scale industrial areas such as the Keiyō Industrial Zone.

Rafting and kayaking

The Minakami

onsen In Japan, are the country's hot springs and the bathing facilities and traditional inns around them. As a volcanically active country, Japan has many onsens scattered throughout all of its major islands. There are approximately 25,000 hot ...

area in Gunma Prefecture is near the source for the Tone River and during the Spring snow melt period, April - June, the river provides consistent grade 4 rapids (on the International Scale of River Difficulty) over a stretch. The river provides some of the best white water rafting and

kayaking Kayaking is the use of a kayak for moving over water. It is distinguished from canoeing by the sitting position of the paddler and the number of blades on the paddle. A kayak is a low-to-the-water, canoe-like boat in which the paddler sits faci ...

in Japan. The snow melt swells the river to grade 4 in spring; in the summer it is a gentle grade 2. The Momijikyo section has 7 grade 3-4 rapids for and is long in total.

Cycling

The Tone River is home to Japan's longest car free cycling path. At over 220km long the Tone River Cycling Road 利根川サイクリングロード starts in Shibukawa City, Gunma and runs all the way to Choshi City, Chiba. The total route is over 230km but the final 10km or so into Choshi is on a road. The remaining 220km is on detached cycling paths high up on the river bank with great views of mountains while in Gunma and large rice fields and agriculture as you approach the ocean.

Image gallery

File:Tone River.JPG, Tone River at Narita and Kawachi File:KurihashiSuiiKansokujo2005-6.jpg, Kurihashi Water Level Observatory (June 2005) File:100 views edo 033.jpg, One of Tone canals, shown in Hiroshige's

Ukiyo-e Ukiyo-e is a genre of Japanese art which flourished from the 17th through 19th centuries. Its artists produced woodblock prints and paintings of such subjects as female beauties; kabuki actors and sumo wrestlers; scenes from history and folk ta ...

File:Tone-River-mouth-2019-Luka-Peternel.jpg, View of Tone River mouth and Chōshi city from air

References

External links

{{Authority control Rivers of Gunma Prefecture Rivers of Ibaraki Prefecture Rivers of Saitama Prefecture Rivers of Chiba Prefecture Rivers of Japan