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🏛 | Yamanashi, Shizuoka Prefecture investigates Fuji River basin Water quality and sludge, start on 28th

Yuki Nagasaki, Governor of Nashi Prefecture (right) and Heita Kawakatsu, Governor of Shizuoka Prefecture, who signed a photo memorandum = 27th morning

Yamanashi and Shizuoka prefecture investigate Fuji River basin Water quality and sludge, start on 28th

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Governor Nagasaki mentioned some reports that chemical substances were found in the Fuji River, saying that "Fuji River is a major river related to the lives of the citizens of both prefectures," and said that he would like to grasp the current situation through scientific research for conservation.

On the 27th, Yamanashi and Shizuoka prefectures signed a memorandum of understanding to investigate water quality and sludge in the Fuji River basin that straddles both prefectures. 28th day… → Continue reading

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Fuji River

Fuji River(Fujikawa) isNagano-Yamanashias well as the ShizuokaFlowing throughRiver.First-class water systemThe main stream of the Fuji RiverThree major torrents in JapanIt is counted as one of.

WorthとSurugaIt is a key route for water transportation, and has been closely related to people's lives since ancient times.


As Kamanashigawa MotoyaJapan Southern AlpsNorthern part, Yamanashi prefectureNaganoLocated on the prefectural border ofMt. NokogiridakeOriginating from (only saws), Nagano PrefectureFujimiAtYatsugatakeEtc. as the sourceTatsubagawaYamanashi Prefecture while merging withHokutoIt forms the prefectural border between Nagano and Yamanashi prefectures.After entering Yamanashi prefecture in Hokuto cityOjiro River,Shiokawa,Miteshi RiverWhile merging withKofu basinTo the south,Nishiyatsushiro-gunIchikawa Misato TownとMinamikoma DistrictFujikawa TownAt the town borderFuefuki RiverMeet with.Up to hereKamanashi RiverCall.

There are various theories about the origin of the name of the Kamanashi River, which is named after the upstream "".KettleDeep likeFuchiLike the edge of a kettle, which is associated with the lack ofEmbankmentBecause there is no need for a kettle because the river water is warm,Koma-gunBecause of the large river that runs through the river, it is called "Komanose River", and it is close to the tradition that "because the amount of water is abundant and the flow is fast, it will be washed away as soon as you try to wash the kettle." Can be mentioned.Among them, the most promising one is the "continuous flow".Kumanashi(No dark circles) ”[1][2].

TypicallyKamanashi RiverとFuefuki RiverDownstream from the confluence ofFuji RiverCall it as it isMount FujiSouthward on the west side of(I.e.,, etc.ShizuokaWhen you enterInago River,ShibakawaBy combining tributaries such asFuji city OfGanbankIn the southTokaidoCrosses with Fuji CityShizuoka CityShimizu WardAt the border withSuruga BayPour into.

Regarding the etymology of the Fuji River, there is a theory that the water flowing from Mt. Fuji gathers to form a river and that it is a change of the Fuji River.[3].

How to call

Officially "FujiOrThe pronunciation is not muddy,Tokaido Shinkansen"FUJI" is written in English on the signboards near the bridge such as Fujikawa Bridge.KAWA "is described,Ministry of Land, Infrastructure, Transport and TourismThe description of the issue of "Fuji"OrWow "is described.In Shizuoka and Yamanashi prefectures in the basin, "Fuji"OrCalled "wa", this is a river of four sounds in Shizuoka, and the second sound is muddy (Abe River, Old place nameShibakawa Town(Currently Fujinomiya City) etc.), but the rules are common,Nationwide, "Fuji It is often mispronounced as "wa"[Source required].

The names in the dictionary are different,KodanshaJapanese Dictionary,Sanseido OfDaijirin(Including goo dictionary and excite dictionary) "FujiOrWhile it says "Wow"Iwanami Shoten OfKojien,ShogakukanIt is also used in the Japanese dictionary and Yahoo dictionary ofDaijisenThen, "Fuji Wow "is mistakenly written.other,NHKEven the announcer of "Fuji It may be mispronounced as "wa" (2012)NHK taiga drama-Kiyomori TairaThen, "Fujikawa's fight").

"Fuji There is also a problem with the above dictionary as a reason for saying "Wow", but the battle of Fujigawa, where Minamoto no Yoritomo and Taira no Koremori fought in 1180, was described as "Fuji". Part of the influence is that it is introduced in history textbooks as "Watakai".[Original research?].

Fujikawa Town, Minamikoma District, Yamanashi Prefecture, and the basin2008(Heisei20 years)May 10Shizuoka Prefecture that existed untilFujikawa Town(Currently Fuji City) officially "FujiOrPronounced "wacho".


Fuji River written in Manyoshu

It is old that the Fuji River appears in the record,Nara periodKnitted inManyoshuVolume XNUMX Honoring Mt. Fuji in March XNUMXLong song(Takahashi no MushimaroThe name of the Fuji River can be seen in (also known as the work of).In the choka, there is a passage that says, "The water of the Fuji River and the mountain (Mt. Fuji) where people cross."

Battle of Fuji River

1180ToYoritomo GengenとTaira no SeimoriThe battle that fought.It is one of a series of campaigns called Genpei War.

Minamoto no Yoritomo, who lost in the Battle of Ishibashiyama, re-emerged in Awa Province, and while advancing, Togoku samurai gathered in this and swelled into a large army and entered Kamakura.Yoritomo fought and won the revenge army led by Taira no Koremori dispatched from the capital in Suruga Province, and established a division in the Kanto region.

River of death

Long time agoSweetfishFishing is popular, and until around 2010, in Kumamoto prefectureKuma RiverAt the same time, it was known all over the country as a river where you can catch "shaku sweetfish" (large sweetfish over 30 cm).Among them, the "Fuji River Ayu Fishing Tournament" has been one of the tourism resources of Yamanashi Prefecture since the first one was held in 90 to commemorate the 1991th anniversary of the Fuji River town system.However, since the 2010s, the habitat of sweetfish has hardly been confirmed.

Shizuoka ShimbunAccording to media reports, a quarryer (partially funded by Nippon Light Metal), whose president (at that time) was the former chief of the hydraulic engineering section in Yamanashi Prefecture, has been in Amehata River (Hayakawa Town, Yamanashi Prefecture) since at least 2011.AcrylamideIllegal dumping of sludge containing polymer has polluted the middle and lower reaches of the Fuji River basin, making it a "death river" where living things cannot live.[4]..The sakura shrimp fishery in Suruga Bay, which had landed 1999 tons in 2451, has decreased significantly in recent years to 2020 tons in 25.8.Nippon Light Metal Amehata DamThe turbid water is pouring into Suruga Bay via the Hayakawa and Fuji rivers, according to the governor of Shizuoka prefecture as of 2020.Heita KawakatsuClaims[5]..The Amehata Dam is a dam dedicated to power generation run by Nippon Light Metal, and the water from the dam lake is used for aluminum smelting of Nippon Light Metal. It is discharged from the spillway of Nippon Light Metal Kambara Factory (Shimizu-ku, Shizuoka City) through the spillway, but as of 2016, the sedimentation rate is 93% and it has no hydraulic control function, so every time it rains, it goes to the neighborhood. Power generation was stopped to prevent flooding, and a large amount of earth and sand containing hedro was discharged from the spillway gate into the Fuji River.Quarryers say, "If the water rises, it will flow."[6]With the knowledge, sludge was dumped on the site, and the concrete company also dumped the concrete waste on the site of the quarryer with the permission of the quarryer, and most of it flowed out to the Amehata River.Due to the high sedimentation rate of the Amehata Dam, Typhoon No. 2019 in August 8 caused great damage such as flooding of the villages around the dam. It has been suspended since August of the year, and now the muddy water of the Amehata Dam is flowing directly into the Fuji River basin.

The issue of illegal dumping of quarryers in Yamanashi Prefecture has also been sued by the Yui Port Fisheries Cooperative (Sakura shrimp accounts for about 9% of the landed amount). It was revealed in 2019 by a joint survey of Shizuoka and Yamanashi prefectures.This issue has been actively reported in the Shizuoka Shimbun, starting with the Sakura shrimp issue in Suruga Bay and the sludge illegal dumping issue after the war.Nippon Light MetalThe Shizuoka Shimbun's special feature "Sakura Shrimp Incident", which cuts into the issue of water rights in Japan, received the "Fisheries Journalist Award" in 2021.[7]..The Shizuoka Shimbun has blamed Amehata Dam and Nippon Light Metal as the cause of the poor catch of Sakura shrimp, which is called "the jewel of Suruga Bay" since 2019. It was reported that it was "unintended use of water rights" that was actually diverted to selling electricity before the construction of "using the place for aluminum smelting".[8].. In February 2020, a local politician (Yamanashi 2st district)Katsuhito NakajimaBy moving members of the House of Representatives to draw out the government's answer, Yamanashi Prefecture will be heard from the Ministry of Land, Infrastructure, Transport and Tourism in November 2020, and from February 11 until the issue of water rights of Nippon Light Metal is discussed in the Diet. Reached[9]..The Shizuoka Shimbun has taken a number of actions, such as requesting information disclosure and questionnaires from Yamanashi Prefecture and local governments, in order to trigger a "water return campaign" by local governments in Yamanashi Prefecture.

On the other hand, the Yamanashi side does not consider it a particular problem, and thinks that the cause of the sakura shrimp non-fishing problem is "I do not know if it is illegal dumping mud", so no investigation such as detection tests has been conducted. .. According to the results of a joint survey of the amount of suspended solids on the Fuji River conducted by Yamanashi and Shizuoka prefectures in 2019, the Yamanashi prefecture side said, "Except when a large amount of rainfall was seen before the survey, noticeable turbidity was seen. "The Fuji River is a clean river with little water pollution."[10]It was concluded.On the other hand, the Shizuoka side recognizes that "there were 4 days in the middle and lower reaches of the Hayakawa River and 5 days in the upper and lower Amehata Dam reservoirs, where there were observation points that exceeded four times the environmental standard." , Conflict with the Yamanashi side trying to describe the cause of the turbidity in the official announcement, after half a year until the official announcement, the Shizuoka Prefectural Fisheries Bureau said, "From the upper reaches of the Amehata River, apart from the official announcement of the Yamanashi Prefecture Air and Water Quality Conservation Division. It is highly possible that the cause is the inflow of earth and sand. "[11]..Regarding the problem of illegal dumping of quarryers in Yamanashi Prefecture, criminal accusations were initially considered by Yamanashi Prefecture, but in June 2019, "removal was completed" and no abnormalities were found in the water quality in the downstream area ( No accusation was made because of the recognition of the Yamanashi Prefectural Environmental Improvement Division).

Dealing with these problems in the Fuji River basin (in Yamanashi prefecture) is also a problem because there is a temperature difference between Shizuoka prefecture and Yamanashi prefecture. In December 2019, the Shizuoka Shimbun reported that the Yamanashi Prefectural Environmental Improvement Division also learned that there are no sweetfish in the Fuji River.Also, as of 2020, the governor of Yamanashi PrefectureKotaro NagasakiThe sludge problem of the Amehata dam is only considered as a problem from the viewpoint of inundation countermeasures, and further, "Yamanashi prefecture has no sea, so we are interested in rivers."[12]And for the Sakura shrimp problem in Suruga BayBecause I have no interest in it[Source required]Yamanashi Prefecture is actually in conflict between the two prefectures, showing actions to deal with the sludge problem in cooperation with the Shizuoka Prefecture side.[13]..At Amehata Dam, the prefectural road and `` Amehata Suspension Bridge'' collapsed due to Typhoon No. 2019 in 19.[14], Governor Nagasaki inspected the dam and severely criticized Nippon Light Metal for inviting the isolation of the district[15]However, Nippon Light Metal itself will record an extraordinary loss of 2020 billion yen in the fiscal year ending March 3 due to the problem of the Amehata dam.[16]The Amehata dam problem, which someone has to deal with because of the administrative guidance from the government, isAs of 2021, the problems are being pushed against each other by Yamanashi Prefecture and Nippon Light Metal.[Source required]

Even if the sweetfish disappear from the Fuji River, the Fuji River Fisheries Cooperative (Minobu Town, Yamanashi Prefecture) does not consider it a problem, but the background is that Nippon Light Metal is paying a large amount of compensation of 1500 million yen a year to the Fuji River Fisheries Cooperative. Was reported by the Shizuoka Shimbun in June 2019[17].

Anime sanctuary

The serialization of manga started in 2015, and the animation broadcast started in 2018.Yuru CampIt is known all over the country as a sacred place, and campaigns have been held in various parts of the basin since the latter half of the 2010s.

"Amehata Dam" and "Amehata Suspension Bridge" are also said to be "sacred places" that appeared in Volume 7 of "Yurucamp".

Flood damage

At the beginning of the Edo period, while creating several tributaries, the eastern part of Fuji City (currently)TagonouraThe city of Fuji, which turns in the direction of) and is located along the river, suffered frequent disasters due to repeated floods.Edo Period(1674), Shigetaka Furugun, Shigemasa, and the three generations of senior fathers and sons spent more than 50 years, changing the flow of the Fuji River itself to the current location that becomes a straight line.Paddy fields on the Fuji River洪水In places where floods were frequent to protect from damageReservoirA large scale with a total length of 2.7 km that also functions asEmbankment"GanbankIs completed and is called "Kashima Gosengoku"Paddy fieldThe Kashima Plain (current JRFuji StationIt was created in the surrounding area).

The current Fuji River adjusts the amount of water to tributaries such as the Urui River,Nippon Light MetalThe Kambara Factory collects water upstream from the Ganbank for its own hydroelectric power generation and drains it directly into Suruga Bay, so there is no flood damage like in the past.1982(57)May 8 OfTyphoon 10Yamanashi Prefecture due to the influence ofOjizawa TownIn addition to flooding (currently Fujikawa Town)National Route 469 OfManei BridgeWhen,Japan National Railway(JNR)Tokaido Main LineThe down line pier was washed away.There were 35 casualties, 46 houses were completely destroyed and spilled, 1,112 were flooded, and the Tokaido Main Line was single-tracked for 75 days.

Fuji River Water Transport

The Fuji River was a torrent and had many difficult points, but as a transportation route between the inland southern part of Kai and Suruga,Suzhou transitWater transportation has been used for a long time.

Edo Period Of1602ToSuruga countryとKai country(CurrentFujikawa Town), And the Fuji River ferry has started.Kai was under the direct control of the shogunate during the Edo periodHeavenBecause it was, in the 12th year of Keicho (1607)Ryo KadokuraThe safety of operation is ensured by the excavation business byEdoWater transportation has developed mainly for transportation to.In the Kanei eraKajikazawa riverbank ・ The Kurosawa and Aoyagi riverbanks were set up to transport rice from Yamanashi, Yashiro, and Koma Sangun, and later from Suwa and Matsumoto in the southern part of Shinano.Daikansho and Yonekura are located on the banks of the river, and there are many piers in coastal towns and villages, and even today, you can see the names of the shops that retain their remnants.

The circulated rice is landed on the banks of Iwabuchi, Suruga Province (currently Fuji City, Shizuoka Prefecture), and is carried to Kambara by horsepower called Kantoku, and further from there.Shimizu PortAfter being collected in, it was sent to Edo by a large ship.Also, for loadingsaltIt was mainly used for products that are not produced inland, such as seafood and marine products, and was also used by travelers in Minobu.According to the "Matsui Document", which records the books from the Edo period to the Meiji era that remain in the Numakubo area along the Fuji River, the items shipped from the riverbank are a wide variety of items such as calligraphy, the three sardines used as materials, and cigarettes. What was done was carried from Koshu.Also these areOmiya TownWas carried to.

Meiji EraIn (1868), the transportation to the United States disappeared and it declined, but was established and developed in 7 by the start-up of a merchant on the banks of Mikawa.center laneWater transportation declined again when land transportation became possible due to the laying of the Fuji River, and the Fuji River Transportation Company was dissolved in 11.Fuji Minobu Railway (currentJR TokaiMinobu Line)1928) And finished its role.

Basin municipality

Hokuto,Nirasaki,Kai city,Minami Alps,Nakakoma DistrictShowa Town,Chuo City,Nishiyatsushiro-gunIchikawa Misato Town(Up to hereKamanashi River)
Minamikoma DistrictFujikawa Town,Minamikoma DistrictMinobu Town,Minamikoma DistrictNanbu Town
Fujinomiya city,Fuji city,Shizuoka City


MinobuyamaKuonji Temple(Minobu Town)
Nichiren sect OfSohonzan(Soyama).National treasureIn addition to cultural properties such asShukuboAlso exists.It is also a famous place for cherry blossoms and autumn leaves.
Kamaguchi Gorge(Fujinomiya City)
In the narrowest part of the Fuji River, which is one of the three major rapids, a unique rock surface is created by a violent muddy stream, making it a magnificent valley.
Fujikawa Rakuza(Fuji City)
Tomei Expressway Fuji River SAWhen,Shizuoka Prefectural Road / Yamanashi Prefectural Road 10 Fuji River Minobu LineIt's aboveRoad StationA facility that has become one.


Local governments in the basin are in parentheses

  • Nagano
    • Hodokubo River (Fujimi Town, Suwa District)
    • Tatsubagawa(Fujimi Town, Suwa District)
    • (Fujimi Town, Suwa District)
  • Yamanashi / Nagano
  • Yamanashi
    • Shiozawa River (Hokuto City)
    • Kofukazawa River (Hokuto City)
    • Ryukawa (Hokuto City)
    • (Hokuto City)
    • Daifukazawa River (Hokuto City)
    • Ojiro River(Hokuto City)
    • (Hokuto City)-Takimichi River,
    • Kurosawa River (Hokuto City)
    • (Hokuto City, Nirasaki City)
    • Shiokawa(Nirasaki City, Hokuto City)-Tochizawa River, Komori River, Hontani River
    • Miteshi River(Minami Alps City)
    • (Minami Alps City)
    • Fuefuki River(Yamanashi,Koshu,Fuefuki city,Kofu City, Chuo City, Ichikawamisato Town, Nishiyatsushiro District)-, Asari River, Nanakaku River,Arakawa,Muddy river,, Asakawa ,,Hikawa,,,,
    • Togawa(Fujikawa Town, Minamikoma District)
    • (Fujikawa Town, Minamikoma District)
    • Koyana River (Fujikawa Town, Minamikoma District)
    • Misawa River (Ichikawamisato Town, Nishiyatsushiro District, Minobu Town, Minamikoma District)-Toida River
    • Teuchizawa River (Minobu Town, Minamikoma District)
    • (I.e.(Minamikoma DistrictHayakawa Town, Minobu Town)-Akegawa ,,, Hogawa, Kuroshira Kawachigawa, Uchikouchigawa, Yukawa, Arakawa, Norogawa (upstream Hayakawa)
    • (Minobu-cho, Minamikoma-gun)-,,,
    • Mimochi River (Minobu Town, Minamikoma District)
    • (Minobu-cho, Minamikoma-gun)-,,
    • Funayama River (Nambu Town, Minamikoma District)
    • (Nambu Town, Minamikoma District)
    • (Nambu Town, Minamikoma District)
    • (Nambu Town, Minamikoma District)
    • Manzawa River(Nambu Town, Minamikoma District)
  • Shizuoka

Parallel traffic



Crossing traffic




In Shizuoka prefectureCommercial power frequencyIs 50Hz on the east side of the Fuji River (TEPCO power grid), 60Hz on the west side (Chubu Electric Power Power Grid),frequencyIs different[18]..Also, in the past, when Shizuoka Prefecture was divided into three or four, the eastern part and the central part were divided with the Fuji River as the boundary.[19]..The Tokaido Shinkansen, which uses AC power, crosses this river, and the frequency is unified at 60Hz east of this river.


[How to use footnotes]
  1. ^ "Let's know the origin of the Kamanashi River!". Sea and Japan PROJECT in Yamanashi. 2019/9/6Browse.
  2. ^ National Diet Library. “Is there a book that describes the history of the Kamanashi River and the origin of its name?”(Japanese). Reference cooperative database. 2019/9/6Browse.
  3. ^ "Let's know the origin of the Fuji River!". Sea and Japan PROJECT in Yamanashi. 2019/9/6Browse.
  4. ^ Mid-downstream area of ​​Fuji River Coagulant, ecosystem destruction or illegal dumping by a trader in Yamanashi Shizuoka Shimbun February 2020, 12
  5. ^ Yamanashi and Governor Shizuoka are still dissatisfied with the plan to remove the sediment from the dam and five Tokyo Domes. --Sankei News 2020.1.6
  6. ^ Yamanashi Prefecture announces the company name of the trader due to illegal dumping of the Amehata River: Nihon Keizai Shimbun
  7. ^ Shizuoka Shimbun serialization "Sakura shrimp incident" Fisheries journalist award | Shizuoka Shimbun at S March 2021, 3
  8. ^ Is the water right used for other purposes? Nippon Light Metal, diverted to selling electricity without smelting Fuji River basin Shizuoka Shimbun at S
  9. ^ Yamanashi XNUMX Town, Submission of Opinion Request for Water Return Problem of Renewal of Water Rights at Nippon Light Metal Power Plant Shizuoka Shimbun at S
  10. ^ Water quality survey of Yamanashi prefecture / Fuji River, etc. (Water quality survey jointly by Yamanashi prefecture and Shizuoka prefecture) Yamanashi
  11. ^ Survey results by Shizuoka and Yamanashi prefectures without describing the cause of the turbidity of the Fuji River: Nihon Keizai Shimbun
  12. ^ Yamanashi and Governor Shizuoka are still dissatisfied with the plan to remove the sediment from the dam and five Tokyo Domes. --Sankei News 2020.1.6
  13. ^ The cause of sakura shrimp non-fishing is unknown. There is also a temperature difference between Yamanashi and Shizuoka prefectures. -Sankei News
  14. ^ Amehata Dam (Yamanashi) A large amount of sludge fish and aquatic plants could not be confirmed on the bottom of the lake Shizuoka Shimbun at S
  15. ^ Governor Yamanashi "Considering suing Nippon Light Metal" Visited upstream flooded Amehata dam -Sankei News
  16. ^ Nippon Light Metal, net income reduced by XNUMX% March financial results, extraordinary loss due to measures against Amehata dam | Shizuoka Shimbun at S
  17. ^ Fujikawa Fisheries Cooperative, turbidity "without investigation" Large amount of compensation from Nippon Light Metal Shizuoka Shimbun at S June 2019, 6
  18. ^ About power frequency area (50Hz area / 60Hz area) Support / Inquiries (Sharp Corporation)
  19. ^ After the merger of the former Fujikawa Town and Fuji City, the border between the eastern part and the central part moved west of the Fuji River.

外部 リンク

  • Fuji River --Water Management and Land Conservation Bureau, Ministry of Land, Infrastructure, Transport and Tourism


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