Jinzu River
The is a river
A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...

 that flows from Gifu Prefecture
Gifu Prefecture
is a prefecture located in the Chūbu region of central Japan. Its capital is the city of Gifu.Located in the center of Japan, it has long played an important part as the crossroads of Japan, connecting the east to the west through such routes as the Nakasendō...

 to Toyama Prefecture
Toyama Prefecture
is a prefecture of Japan located in the Hokuriku region on Honshū island. The capital is the city of Toyama.Toyama is the leading industrial prefecture on the Japan Sea coast, and has the industrial advantage of cheap electricity due to abundant water resources....

 in Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

. It is called Miya River (宮川 Miya-gawa) in Gifu. It is 120 km (120,000 m) in length and has a watershed of 2720 square kilometre.


The river flows from Mount Kaore in Gifu and meets the Takahara River
Takahara River
The has its source at Mount Norikura in the northern part of Gifu Prefecture, Japan, and flows into Toyama Prefecture, where it joins with the Jinzū River...

 at the border between Gifu and Toyama. Then it flows straight to the north and pours into Toyama Bay
Toyama Bay
is a bay located on the northern shores of Honshu, Japan. The bay borders Toyama and Ishikawa prefectures. The bay is known for the mirages on the horizon during the winter months. It is also one of Japan's three largest bays.-Border communities:...

 and the Sea of Japan
Sea of Japan
The Sea of Japan is a marginal sea of the western Pacific Ocean, between the Asian mainland, the Japanese archipelago and Sakhalin. It is bordered by Japan, North Korea, Russia and South Korea. Like the Mediterranean Sea, it has almost no tides due to its nearly complete enclosure from the Pacific...

. It once meandered through the city of Toyama
Toyama, Toyama
is the capital city of Toyama Prefecture, Japan, located on the coast of the Sea of Japan in the Chūbu region on central Honshū, about 200 km north of the city of Nagoya and 300 km northwest of Tokyo....

, but the new waterway was constructed in the west of the city to avoid floods. Toyama City Hall and other governments are located on the reclaimed land of the old river.


The river was polluted with cadmium
Cadmium is a chemical element with the symbol Cd and atomic number 48. This soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Similar to zinc, it prefers oxidation state +2 in most of its compounds and similar to mercury it shows a low...

 due to mining
Mining is the extraction of valuable minerals or other geological materials from the earth, from an ore body, vein or seam. The term also includes the removal of soil. Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock...

 and caused the itai-itai disease
Itai-itai disease
, was the documented case of mass cadmium poisoning in Toyama Prefecture, Japan, starting around 1912. The cadmium poisoning caused softening of the bones and kidney failure. The disease is named for the severe pains caused in the joints and spine. The term itai-itai disease was coined by locals...

 in the downstream towns around World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...



The Japanese Navy
Imperial Japanese Navy
The Imperial Japanese Navy was the navy of the Empire of Japan from 1869 until 1947, when it was dissolved following Japan's constitutional renunciation of the use of force as a means of settling international disputes...

A cruiser is a type of warship. The term has been in use for several hundreds of years, and has had different meanings throughout this period...

Japanese cruiser Jintsu
was a Sendai-class light cruiser in the Imperial Japanese Navy, named after the Jinzū River in the Gifu and Toyama prefectures of central Japan.-Background:...

was named after this river.

External links

36.761787°N 137.222042°W (mouth)
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