古川

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古川 flows into the sea: 17 km flows in at N 35° 39′ 9″, E 139° 45′ 32″ at OSM node n4130750449.

古川 has 1 tributaries.

• 渋谷川, which joins it at N 35° 38′ 48″, E 139° 43′ 26″ at OSM node n2706852313, and 12 km of total upstream flows in.
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