古川

古川 is 5 km long, and has a stream level of 1.

Map of 古川

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古川 flows into 神通川 , which it joins at N 36° 41′ 35″, E 137° 11′ 49″ at OSM node n720774283, and there 1,669 km of total upstream flows in.

古川 has 3 tributaries.

(unnamed) , which joins it at the following points: 3 km of total upstream flows in at N 36° 41′ 47″, E 137° 10′ 43″ at OSM node n720772985 3 km of total upstream flows in at N 36° 41′ 48″, E 137° 10′ 55″ at OSM node n720773007

(unnamed), which joins it at N 36° 41′ 16″, E 137° 9′ 35″ at OSM node n720772169, and 4 km of total upstream flows in.

(unnamed), which joins it at N 36° 41′ 34″, E 137° 10′ 15″ at OSM node n720772263, and 408 m of total upstream flows in.