Armageddon: The Great Battle with Genma (1983) IMDb
Kawajiri Yoshiaki (key animator).
Review refers to the English dub.
There is a certain amount of dreamy Rintaro goodness to the animation, but the poor quality of the dub and script (and score!) kill it for me.
Japanese production animation fiction moving picture
Viewed 2019-01-22. Ugly in unsafe old browsers.