Tomoyuki TANAKA, who is a producer and worked together with Okamoto for a long time, is also famous for having fostered special effects movies at Toho, however, as Okamoto declared publicly that he disliked special effects (probably in his film he could not accept the production system containing a part which was out of his control), Tanaka never proposed him any plans of that type.
長年名コンビを組んだプロデューサーの田中友幸は、一方では東宝特撮映画の育ての親として有名だが、岡本が特撮嫌いを公言していた（自作に権限外のパートが混在するシステムが相容れなかったと思われる）こともあり、彼にその種の企画を振ることはなかった。