Nagaoka University (長岡大学, Nagaoka daigaku) is a private university in Nagaoka, Niigata, Japan. The predecessor of the school was founded in 1905.^{[citation needed]} In 1971, the institution was reorganized as the Nagaoka Women's Junior College and in 1973 was chartered as a coeducational junior college. One of the first teachers of the Women's College was Kanai Yoshiko.^[1] In 2001 it became a four-year college. ^{[citation needed]}