古安川

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古安川 flows into the sea: 670 m flows in at N 34° 57′ 20″, E 138° 27′ 29″ at OSM node n735554088.

古安川 has 1 tributaries.

• (unnamed), which joins it at N 34° 57′ 27″, E 138° 27′ 25″ at OSM node n1395987508, and 235 m of total upstream flows in.
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