The Naka River (南賀ノ川, Naka no kawa; Literally meaning "River of Southern Joy") is a river flowing through Konohagakure. The river is located on the land where the Uchiha clan once lived and prospered^[1] and at some point, it passes through a deep ravine. It was at this river that Shisui "erased his existence", but it was thought that Itachi had drowned him.^[2]

References

1. ↑ Naruto Second Databook, page 307
2. ↑ Naruto chapter 550, page 11