Amongst revolt within the government, Godzilla does battle with a giant mech constructed by the Self Defense Force.

The concept for this production was penned by longtime series writer Shinichi Sekizawa along with producer and then Toho president Tomoyuki Tanaka. Despite what the title might suggest, Godzilla's rival in this production was to be a humanoid robot constructed by the Self Defense Force, either as part of the "Asuka Fortress" or it was to be the title character. Details are unfortunately very scarce, and among those things uncertain is what type of role Godzilla was to play. Due to the revolt within the government, which was certainly an interesting story vehicle on the part of writer Sekizawa, it's quite possible that the "Asuka Fortress" was going to be manned by a rogue part of the government and the movie could have seen Godzilla slip into his hero persona to defeat it. In fact, it's quite possible that this movie would have continued the Showa series, although given the lack of details it's hard to say for sure either.

Note: no picture or concept art exists for Godzilla's opponent in the proposed feature, and the above design is merely Toho Kingdom's interpretation.