Asuka Fortress (アスカ要塞Asuka Yōsai?) is an unused kaiju from the unmade 1979 Godzilla film, Godzilla vs. Asuka Fortress.
Asuka Fortress was supposed to look like an agile robot.
From what little is known about Asuka Fortress, it would have been constructed by the J.S.D.F. to defend Japan. However, it would have gone rouge, forcing Godzilla to defeat it.