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] |
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| 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] |
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