The river flows south from the eastern foot of
Mt. Ikoma (altitude 642 m), near the border between
Osaka Prefecture and
Nara Prefecture, and joins the
Yamato River at
Ikaruga,
Nara Prefecture. The catchment area is about , and the channel length is about . The Tatsuta River has long been known as the 'Heiguri River'. In the
Edo period, the area near Tatsuta was called 'Tatsuta River' or 'Nishino Okawa', and the area near
Mt. Mimuro was called 'Shiota River'. The river was mentioned in Japanese poems of the
Heian period, but this 'Tatsuta River' refers to the vicinity of Kamenose, the main stream of the
Yamato River. Along the Tatsuta River in
Ikaruga Town, Nara Prefectural Tatsuta Park has been developed as an urban green area for about . Every year from late November to early December, the
Momiji Festival is held at Tatsuta Park. The river has also flood-prone areas, and there have been instances of flood damage caused by torrential rains in August 1992, August 1999, July 2000, and June 2016.
Municipalities Nara Prefecture •
Ikoma City (source) •
Heguri •
Ikaruga ==History==