Seki River
| The Seki River (関川) is a Class A river in Niigata Prefecture and Nagano Prefecture, Japan.[1][2] Approximately 210,000 people live in the basin area.[2] | ||||||
| Source： Niigata-Yakeyama | ||||||
| Mouth： Sea of Japan | ||||||
| Length： 64 km (40 mi) | ||||||
| Basin size： 1,140 km2 (440 sq mi) | ||||||
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