Sai River (Nagano)
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Sai River (Nagano)
The , is a river in Japan, located in northeastern Honshu and flowing generally northeast through Nagano Prefecture. It is a tributary of Shinano River, the longest river in Japan. The Sai River is 153 km long with a watershed of 2773 sq km, and has its source at the confluence of rivers Azusa AZUSA refers to a ground-based radar tracking system installed at Cape Canaveral, Florida and the NASA Kennedy Space Center. AZUSA was named after the southern California town Azusa, California where the system was devised in the early 1950s. ... and Narai in Matsumoto city. References {{reflist Rivers of Nagano Prefecture Rivers of Japan ...
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Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands—Hokkaido, Honshu, Shikoku, and Kyushu—and List of islands of Japan, thousands of smaller islands, covering . Japan has a population of over 123 million as of 2025, making it the List of countries and dependencies by population, eleventh-most populous country. The capital of Japan and List of cities in Japan, its largest city is Tokyo; the Greater Tokyo Area is the List of largest cities, largest metropolitan area in the world, with more than 37 million inhabitants as of 2024. Japan is divided into 47 Prefectures of Japan, administrative prefectures and List of regions of Japan, eight traditional regions. About three-quarters of Geography of Japan, the countr ...
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Nagano Prefecture
is a Landlocked country, landlocked Prefectures of Japan, prefecture of Japan located in the Chūbu region of Honshu. Nagano Prefecture has a population of 2,007,682 () and has a geographic area of . Nagano Prefecture borders Niigata Prefecture to the north, Gunma Prefecture to the northeast, Saitama Prefecture to the east, Yamanashi Prefecture to the southeast, Shizuoka Prefecture and Aichi Prefecture to the south, and Gifu Prefecture and Toyama Prefecture to the west. Nagano (city), Nagano is the capital and largest city of Nagano Prefecture, with other major cities including Matsumoto, Nagano, Matsumoto, Ueda, Nagano, Ueda, and Iida, Nagano, Iida. Nagano Prefecture has impressive highland areas of the Japanese Alps, including most of the Hida Mountains, Kiso Mountains, and Akaishi Mountains which extend into the neighbouring prefectures. The area's mountain ranges, natural scenery, and history has gained Nagano Prefecture international recognition as a winter sports tourist de ...
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Nagano (city)
is the capital and largest Cities of Japan, city of Nagano Prefecture, located in the Nagano Basin (Zenkoji Daira) in the central Chūbu region of Japan. Nagano is categorized as a Core cities of Japan, core city of Japan. Nagano City is the highest prefectural capital in Japan, with an altitude of . The city is surrounded by mountains, the highest of which is Mount Takatsuma (2,353 m), and it is near the confluence of the Chikuma River—the longest and widest river in Japan—and the Sai River. , the city had an estimated population of 365,296 in 160,625 households, and a population density of 438 persons per km². The total area of the city is . Overview Nagano City, located in the former Shinano Province, developed in the Nara period (AD 710 to 794) as a temple town (''monzen machi''). The city of Nagano is home to Zenkō-ji, a 7th-century Buddhism, Buddhist temple that is listed as a National Treasure (Japan), Japanese National Treasure. Zenkō-ji was established at its ...
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Azumino
is a city located in Nagano Prefecture, Japan. , the city had an estimated population of 97,761 in 39744 households, and a population density of 290 persons per km2. Its total area is . Etymology of Azumino Azumino is a combination of two words, "Azumi" and "no". "Azumi" comes from the Azumi people, who are said to have moved to the "no" (plain) in ancient times. The Azumi people originally lived in northern Kyushu, and were famed for their skills in fishing and navigation. "The Azumi people" can be translated as "the people who live on the sea." The reason why the seafaring people migrated to this mountainous region is a mystery. Geography Azumino is located in the Azumino Plateau on the northwestern end of the Matsumoto Basin, between mountain ranges to the west and east. The range of mountains on the western border is known as the Northern Alps (Hida Mountains) and is popular among hikers all over Japan. To the south is the city of Matsumoto, Nagano prefecture's second lar ...
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Matsumoto, Nagano
is a Cities of Japan, city located in Nagano Prefecture, Japan. Matsumoto is designated as a Core cities of Japan, core city since 1 April 2021. , the city had a population of 239,466 in 105,207 households and a population density of 240 persons per km2. The total area of the city is . History Matsumoto is located in the former Shinano Province and was the kokufu, provincial capital from the Heian period onwards. The area developed as the castle town of Matsumoto Domain under the Tokugawa shogunate of the Edo period. Modern Matsumoto Town was established with the creation of the municipalities system on 1 April 1889. It was raised to city status on 1 May 1907. On 1 February 1925, Matsumoto absorbed the village of Matsumoto (from Higashichikuma District, Nagano, Higashichikuma District). The city expanded further by annexing the Kanda hamlet of the village of Nakayama from Higashichikuma District, Nagano, Higashichikuma District on 1 April 1943, the villages of Nakayama, Shim ...
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Shinano River
The , known as the in its upper reaches, is the longest and widest river in Japan and the third largest by basin area (behind the Tone River and Ishikari River). It is located in northeastern Honshu, rising in the Japanese Alps and flowing generally northeast through Nagano and Niigata Prefectures before emptying into the Sea of Japan. It is designated as a Class A river. History The Shinano River has a long history in Honshu, and along with other rivers in the region, has a significant effect on the geography and ecology of the area. Originally, the Shinano River would have drained straight into an estuary-like Fukushima lagoon before making its way into the Sea of Japan after flowing down from the Japanese Alps. Over centuries of sediments being brought downstream, a marshy plain formed in the lagoon into what is currently the Echigo Plain. Estimates presented in 1993 place the amount of loose sediment in the river system at . The construction of diversion channels have ...
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Honshu
, historically known as , is the largest of the four main islands of Japan. It lies between the Pacific Ocean (east) and the Sea of Japan (west). It is the list of islands by area, seventh-largest island in the world, and the list of islands by population, second-most populous after the list of islands of Indonesia, Indonesian island of Java. Honshu had a population of 104 million , constituting 81.3% of the entire population of Japan, and mostly concentrated in the coastal areas and plains. Approximately 30% of the total population resides in the Greater Tokyo Area on the Kantō Plain. As the historical center of Japanese cultural and political power, the island includes several past Japanese capitals, including Kyoto, Kyōto, Nara (city), Nara, and Kamakura. Much of the island's southern shore forms part of the Taiheiyō Belt, a megalopolis that spans several of the Japanese islands. Honshu also contains Japan's highest mountain, Mount Fuji, and its largest lake, Lake Biwa. Mo ...
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Azusa River
The is a river within the Hida Mountains or ''Northern Japanese Alps'', in the western region of Nagano Prefecture, Japan. The river belongs to the Shinano River watershed, and forms the upper section of the Sai River. The name of the river comes from the tree found in the river basin, which are used for Azusa Yumi, a sacred bow in Shinto rituals. The river gives its name to the Azusa limited express train, which is operated by the East Japan Railway Company (JR East), and which runs mainly between Shinjuku Station in Tokyo and Matsumoto Station in Nagano. Geography The Azusa River is 65 km long with a watershed of 559 sq km, and has its source on the southeastern slope of Mount Yari in the Chūbu-Sangaku National Park. The river flows through the valley - designated as one of Japan's National Cultural Assets, on the list of Special Natural Monuments and Special Places of Scenic Beauty.
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