Saigawa

Japanese: 犀川 - さいがわ

A river that flows through northern Nagano Prefecture. It is the largest tributary of the Chikuma River. It is 153 km long. The Narai River and Azusa River join together in the northeast of Matsumoto City to form the Sai River, which then joins with the Takase River at Akashina in Azumino City and flows north through the Chikuma Mountains. It joins with the Susobana River near the urban area of Nagano City and the Chikuma River near Kawanakajima. In the Matsumoto Basin in the upper reaches and the Nagano Basin in the lower reaches, the river becomes rough due to the development of wide floodplains, but in the Chikuma Mountains it is a pre-disciplined river that meanders through deep valleys, with river terraces distributed everywhere, and beautiful gorges such as Yamakiyo-ji and Kume-ji. From 1832, there was boat transport between Shinmura in Matsumoto City and Shinshu-shinmachi in Nagano City, but this mission ended with the opening of the Shinonoi Line and National Route 19. It also serves as a source of hydroelectric power.

Saigawa

The former area of Miyako Town in the southern part of eastern Fukuoka Prefecture. It extends from the upper and middle reaches of the Imagawa and Haraigawa rivers, which flow into the Suo-Nada Sea, to the northern slope of the Hiko Mountains. It was incorporated as a town in 1943. In 1956, the villages of Shiroi and Irahara were incorporated. In 2006, it was merged with the towns of Katsuyama and Toyotsu to become Miyako Town. It is long and narrow from north to south, and its southern part borders Oita Prefecture. Most of it is mountainous. The central area, Honjo, is located on the alluvial plain of the Imagawa River. The main industry is agriculture, with rice and wheat grown, as well as chestnuts and lumber. In the northern part, there are scattered ancient tombs around Kiyama and the valley mouth, and the national historic site Goshogatani Kamigoishi (→ Kamigoishi ). At the southern end, there is the Naganuma Family House, a national important cultural property, and Notoge and Hebibuchinotaki waterfalls, which are part of the Yaba-Hita-Hikosan Quasi-National Park.

Saigawa

A river that flows through the center of the Kanazawa Plain in Ishikawa Prefecture. Its total length is about 37 km. The Kuratani River, which originates at Mt. Daimon (1,572 m) on the border with Toyama Prefecture, and the Futamata River, which originates at Mt. Naradake (1,644 m), join together to form the Sai River, which flows northwest through Kanazawa City and empties into the Sea of Japan at Kanaishi. Kanaishi at the river's mouth is part of Kanazawa Port. Since the Edo period, water has been drawn into the city of Kanazawa through the Tatsumi Irrigation Canal and the Kurazuki Irrigation Canal, and has been used for irrigation, fire prevention, and industrial water. The Sai River Dam was completed upstream in 1965.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

長野県北部を流れる川。千曲川最大の支流。全長 153km。松本市北東部で奈良井川と梓川が合流して犀川となり，安曇野市の明科で高瀬川を合わせ，筑摩山地を北流する。長野市の市街地付近で裾花川と，川中島付近で千曲川と合流する。上流部の松本盆地と下流部の長野盆地では，広い氾濫原が発達して荒れ川となるが，筑摩山地では深く谷を刻んで蛇行する先行性河川で，いたるところに河岸段丘が分布し，山清路や久米路の峡谷美もある。天保3（1832）年から松本市新村と長野市信州新町の間に舟運があったが，篠ノ井線や国道19号線の開通によりその使命を終えた。水力発電源ともなっている。

犀川
さいがわ

福岡県東部，みやこ町南部の旧町域。周防灘に注ぐ今川，祓川の上・中流域から英彦山地北斜面に広がる。 1943年町制施行。 1956年城井村，伊良原村を編入。 2006年勝山町，豊津町と合体して，みやこ町となった。南北に細長く，南部は大分県に接する。大部分は山地。中心地区の本庄は今川の沖積地にある。おもな産業は農業で，米やコムギを栽培し，ほかにクリ，材木も産する。北部の木山，谷口付近には古墳が散在し，国の史跡御所ヶ谷神籠石 (→神籠石 ) がある。南端に国の重要文化財の永沼家住宅，耶馬日田英彦山国定公園に属する野峠，蛇淵の滝がある。

犀川
さいがわ

石川県，金沢平野の中央部を流れる川。全長約 37km。富山県との県境にある大門山 (1572m) に発する倉谷川と奈良岳 (1644m) に発する二又川が合流し犀川となり，北西流して金沢市内を貫流，金石 (かないわ) で日本海に注ぐ。河口の金石は金沢港の一部。江戸時代から辰巳用水，鞍月用水で金沢の市街地に引き水され，灌漑，防火，工業用水として利用された。 1965年上流に犀川ダムが完成。

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