
Pot-holes (自然の甌穴) in Nagatoro are sculpted rock bowls in the Arakawa river—tight compositions of circular basins, swirling water and textured bedrock. Shoot low and close to emphasize patterns; best at dawn or late afternoon for soft side light. Visit in low flow (summer/fall) to expose potholes; autumn adds color. Trails and river access are easy from central Nagatoro; use public parking or station access. Respect signs and avoid stepping into fragile channels.

Pot-holes (自然の甌穴) in Nagatoro are sculpted rock bowls in the Arakawa river—tight compositions of circular basins, swirling water and textured bedrock. Shoot low and close to emphasize patterns; best at dawn or late afternoon for soft side light. Visit in low flow (summer/fall) to expose potholes; autumn adds color. Trails and river access are easy from central Nagatoro; use public parking or station access. Respect signs and avoid stepping into fragile channels.