is a city located in Nagano Prefecture, Japan. , the city had an estimated population of 68,177 in 27587 households, and a population density of 100 persons per km<sup>2</sup>. The total area of the city is . In 2016, the former town of Takatà Â, now part of Ina, was selected as one of The Most Beautiful Villages in Japan.
Ina is located in south-central Nagano prefecture. It is bordered to the east by the Akaishi Mountains, including Mount Nyukasa (1955 meters), Mount Nokogiri (2685 meters), Mount Senjà  (3033 meters), and Mount Shiomi (3047 meters). The Tenryà « River runs through the city.
The city has a climate characterized by hot and humid summers, and relatively mild winters (Köppen climate classification Cfa). The average annual temperature in Ina is . The average annual rainfall is with July as the wettest month. The temperatures are highest on average in August, at around , and lowest in January, at around .
The area of present-day Ina was part of ancient Shinano Province. The area was part of the holdings of Takatà  Domain during the Edo period and Ina developed as a jà Âkamachi surrounding Ina Castle and as a river port on the Tenryà « River. The village of Ina was established within Ina District the creation of the municipalities system on April 1, 1889, and was raised to town status on October 15, 1897. The town of Ina merged with the villages of Tomigata, Misuzu, Tera, Higashiharuchika and Nishiminowa (all from Kitaiina District) to form the city of Ina on April 1, 1954. Ina annexed the village of Nishiharuchika in 1965. On March 31, 2006, Ina absorbed the town of Takatà Â, and the village of Hase (both from Kamiina District to create the new and expanded city of Ina.
Per Japanese census data, the population of Ina has remained relatively stable over the past 70 years.
Ina has a mayor-council form of government with a directly elected mayor and a unicameral city legislature of 21 members.
The economy of Ina is largely agricultural, with rice, pears, tomatoes and dairy farming as major components. The manufacturing sector includes electronics and precision instrumentation. Rubycon Corporation, an electronic components company has its headquarters in the city.
Ina has 15 public elementary schools and six public middle schools operated by the city government. There are three public high schools operated by the Nagano Prefectural Board of Education and one private high school. The prefecture also operated one special education school.
The city has one international school (Colégio Desafio) - Brazilian primary school.