Kuninaka Plain

A rift plain between the Osado Mountains and the Kosado Mountains on Sado Island (Sado City) in Niigata Prefecture. It is 8 kilometers wide, 12 kilometers long, and 150 square kilometers in area. Its peak is the alluvial plateau on the shores of Lake Kamo on the shores of Ryotsu Bay, and it slopes gently to the southwest. The Kokufu River fills in the center, making it the rice-producing region of Sado. Settlements are lined up on the alluvial plateau at the foot of the two mountains, and the two main transportation routes are the Osado Route and the Kosado Route. Old exile cultural sites such as Mano Shrine, which enshrines Emperor Juntoku, and Konpon Temple at the Nichiren ruins are located along the Kosado Route. The area is centered around the former Ryotsu City area in the northeast and the former Sawada Town area in the southeast.

[Hisao Yamazaki]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

新潟県佐渡島(さどがしま)（佐渡市）の大佐渡山地と小佐渡山地の間にある地溝帯平野。幅8キロメートル、長さ12キロメートル、面積150平方キロメートル。両津(りょうつ)湾岸にある加茂(かも)湖岸の洪積台地を頂点として、南西に緩く傾斜し、中央を国府川が埋め立てして佐渡の米どころをなす。集落は両山地麓の洪積台地面に並び、主要交通路は大佐渡回りと小佐渡回りの2幹線が循環する。順徳(じゅんとく)上皇を祀(まつ)る真野(まの)宮や日蓮(にちれん)遺跡の根本(こんぽん)寺などの古い流人文化遺跡は小佐渡回り沿線にある。北東の旧両津市域、南東の旧佐和田町域が中心をなす。

［山崎久雄］

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