(unnamed)

(unnamed) is 2 km long, and has a stream level of 0.

Map of (unnamed)

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(unnamed) flows into the sea: 3 km flows in at N 35° 22′ 30″, E 136° 58′ 35″ at OSM node n727239624.

(unnamed) has 2 tributaries.

二ヶ洞川, which joins it at N 35° 22′ 33″, E 136° 58′ 56″ at OSM node n2505670425, and 307 m of total upstream flows in.

田口大洞川, which joins it at N 35° 22′ 33″, E 136° 58′ 55″ at OSM node n726997646, and 193 m of total upstream flows in.