Saku Basin

Japanese: 佐久盆地 - さくぼんち

It is commonly known as Sakudaira. It is a plateau basin in the upper reaches of the Chikuma River in eastern Nagano Prefecture. At an altitude of 600-1000m, it is surrounded by Mt. Asama, the Kanto Mountains, and the Yatsugatake Mountain Range, and the surrounding area transitions to volcanic foothills. It is roughly divided into two regions, east and west, by the Chikuma River, which runs north to south. The western part is a plateau called Mimakigahara and Yaehara, where loam layers have accumulated at an altitude of over 700m. The eastern part is further divided in two by the Namezu River, a tributary of the Chikuma River. The northern half is a deposit of mudflows from Mt. Asama, and the southern half is an alluvial fan of the Chikuma River. It has a typical inland climate with little precipitation. In addition to rice cultivation, highland vegetables and flowers are cultivated in the highland areas at altitudes of over 800m. Saku carp were once cultivated in the rice paddies, but now they are cultivated in reservoirs. The surrounding plateau is home to many villas, including the Karuizawa Plateau at the foot of Mount Asama. The main cities are Komoro and Saku.

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

Japanese:

通称は佐久平 (さくだいら) という。長野県東部，千曲川上流域にある高原性の盆地。標高 600～1000mで，浅間山，関東山地，八ヶ岳連峰などに囲まれ，周辺は火山裾野へ移行する。南北方向に縦貫する千曲川で東西2地域に大別される。西部は御牧ヶ原，八重原と呼ばれる，標高 700m以上のローム層が堆積した台地。東部は千曲川の支流滑津 (なめづ) 川でさらに2分され，北半は浅間山泥流の堆積地，南半は千曲川の扇状地。典型的な内陸性気候で降水量は少い。米作のほか，標高 800m以上の高冷地で高原野菜，花卉などの栽培が行われる。水田ではかつて佐久鯉の養殖が行われたが，現在はため池養殖に変った。周辺の高原部は浅間山麓の軽井沢高原をはじめ別荘地が多い。中心都市は小諸，佐久の両市。

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