Tatsuno, Nagano

 is a town located in Nagano Prefecture, Japan. , the town had an estimated population of 18,951 in 7917 households, and a population density of 112 persons per km². The total area of the town is .
Geography.
Tatsuno is located in the Ina Valley of south-central Nagano Prefecture, bordered by the Kiso Mountains. The Tenryū River flows through the town, which is surrounded by mountains and is rich in a natural environment. It is takes about 3 hours from Tokyo, 2 hours from Nagoya, 5 hours from Kyoto by train and equally by car. Part of the town is within the borders of the Enrei Ōjō Prefectural Natural Park. The Yokokawa Dam is located in Tatsuno.
Demographics.
Per Japanese census data, the population of Tatsuno has remained relatively steady over the past 60 years.
Climate.
The village has a climate characterized by characterized by warm and humid summers, and cold winters (Köppen climate classification "Dfa"). The average annual temperature in Tatsuno is 6.7 °C. The average annual rainfall is 1549 mm with September as the wettest month. The temperatures are highest on average in August, at around 22.2 °C, and lowest in January, at around -3.1 °C.
History.
The area of present-day Tatsuno was part of ancient Shinano Province. The village of Inatomi established on April 1, 1889 by the establishment of the municipalities system, and was elevated to town status on January 1, 1947, changing its name to Tatsuno at that time. The neighboring village of Asahi was annexed on April 1, 1955, followed by Kawashima on September 30, 1956 and Ono on March 31, 1961.
Education.
Tatsuno has five public elementary schools and five public middle school operated by the town government, and one high school operated the Nagano Prefectural Board of Education. The Shinshu Honan Junior College is also located in Tatsuno.