Marquis Asano Nagakoto (浅野 長勲, August 28, 1842 – February 1, 1937) was a daimyō of Hiroshima Domain for a short time after the Meiji Restoration.

For the rest of the Meiji period, he was a politician and diplomat, and was one of the last surviving Japanese daimyō (Hayashi Tadataka and Wakebe Mitsunori outlived him).

The domains (han) were abolished in 1871, but Asano was granted the title of Marquis (kōshaku) under the kazoku system of peerage which was instituted at that time.

He became a member of the Genrōin (Chamber of Elders) in 1880, was appointed ambassador to Italy two years later, and served in the House of Peers for a time as well.

Though living and serving in Tokyo, he worked to support industry and other enterprises in his home area, newly dubbed Hiroshima Prefecture.