Kitaaiki (北相木村, Kitaaiki-mura) is a village located in Nagano Prefecture, Japan.

[2] Per Japanese census data,[3] the population of Kitaaiki has decreased over the past 70 years and is now less than a third of what it was in 1950.

The area of present-day Kataaiki was part of ancient Shinano Province, and was mentioned in Muromachi period records.

The present village of Kitaaiki was created with the establishment of the modern municipalities system on April 1, 1889.

Kitaaiki is known for its cool and pleasant mountain climate and tourists come to the village to escape the summer heat.