大古川

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大古川 flows into the sea: 477 m flows in at N 35° 20′ 4″, E 137° 50′ 39″ at OSM node n9957264210.

大古川 has 1 tributaries.

• (unnamed), which joins it at N 35° 20′ 4″, E 137° 50′ 46″ at OSM node n9957264221, and 280 m of total upstream flows in.
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