(unnamed)

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(unnamed) flows into 藤古川 , which it joins at N 35° 20′ 19″, E 136° 29′ 20″ at OSM node n726122533, and there 57 km of total upstream flows in. load it's distributaries

(unnamed) has 2 tributaries.

• 西谷, which joins it at N 35° 20′ 30″, E 136° 29′ 24″ at OSM node n726068336, and 2 km of total upstream flows in.
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• 宮ヶ谷, which joins it at N 35° 20′ 30″, E 136° 29′ 24″ at OSM node n726068336, and 844 m of total upstream flows in.
load it's tributaries