Kiso River in the context of "Kiso Valley"

The Nōbi Plain (濃尾平野, Nōbi Heiya) is a large plain in Japan that stretches from the Mino area of southwest Gifu Prefecture to the Owari area of northwest Aichi Prefecture and extreme northern Mie Prefecture, covering an area of approximately 1,800 square kilometres (695 sq mi). It is an alluvial plain created by the Kiso Three Rivers (the Ibi, Kiso and Nagara rivers) and has very fertile soil. It is bordered on the west by the Ibuki and Yōrō mountain ranges, and to the east by the Owari Hills. Its northern border is marked by the Ryōhaku Mountains and the south by Ise Bay.

35°17′N 136°39′E / 35.28°N 136.65°E / 35.28; 136.65

The Kiso Three Rivers (木曽三川, Kiso Sansen) are the three major rivers that make up the alluvial plain area of the Nōbi Plain of Japan. The three rivers are the Kiso River, the Ibi River and the Nagara River. Given their location, they are sometimes referred to as the Nōbi Three Rivers (濃尾三川 Nōbi Sansen).

The Ibi River (揖斐川, Ibi-gawa) is a tributary of the Kiso River located in Gifu and Mie Prefectures in Japan. Along with the Nagara and Kiso rivers, the Ibi is the third of the Kiso Three Rivers of the Nōbi Plain. It is one of Japan's first-class rivers. The former Tōkaidō post station of Kuwana-juku was located on the western banks of this river during the Edo period.

The Nagara River (長良川, Nagara-gawa) has its source in the city of Gujō, Gifu Prefecture, and its mouth in the city of Kuwana, Mie Prefecture, Japan. Along with the Kiso River and Ibi River, the Nagara River is one of the Kiso Three Rivers of the Nōbi Plain. Previously, the river was named Sunomata River (墨俣川 Sunomata-gawa). With a length of 166 km (103 mi), it drains an area of 1,985 square kilometres (766 sq mi) in the Chūbu region and empties into Ise Bay. The government of Japan classifies it as a Class 1 river.

The Owari Hills (尾張丘陵, Owari Kyūryō) are a set of hills located in the mid-western part of Aichi Prefecture, Japan. Centuries ago, this area made up the eastern portion of the Owari Domain.

The northern section of the hills rises about 200 m (656 ft) above sea level. From there, the hills stretch from the city of Inuyama on the southern banks of the Kiso River to the southeast, going through the communities of Komaki and Kasugai, then continuing to the southwest until Mount Sanage along the border between Toyota and Seto. From there, the hills continue in a south westerly direction before finishing on the Chita Peninsula.