Ainono Station opened on October 10, 1920, as a station on the Japanese Government Railways (JGR), serving the village of Sannai, Akita. The JGR became the Japan National Railways (JNR) after World War II. The station was absorbed into the JR East network upon the privatization of the JNR on April 1, 1987. A new station building was completed in July 1996.
