Der Ring des Nibelungen

Der Ring des Nibelungen is a manga by Leiji Matsumoto using the musical by Richard Wagner as a motif. An OVA called Harlock Saga: Der Ring des Nibelungen was released as an adaptation.

Overview
Matsumoto had envisioned to create a manga version of Wagner's musical of the same name using Captain Harlock and his crew as the main cast. The series was originally published in Shinchosha but the magazine was discontinued with only mentions in a few used car ads. It was later continued through Web Magazine Web Shincho until both the third and fourth parts of the manga were discontinued.