Jangaru taitei

Yes, 'Lion King' did copy from it (and from Hamlet and from Bambi and...), but Jangari taitei also copied Disney and other US cartoons. The plot differs!

Jangari taitei is a blatant glorification of Japanese subjugation and exploitation of East Asia in the 1900's, masked as Africa, and "against the White colonialists". Today the Japanese Cuture Institute only shows it with a longer apology in advance.

Pure white young Reo/Leo/Kimba then turns to methods different from his father's robberies and can counter the trinity of Sowjets, US Americans and British. All this is on a metaphorical yet obvious level, but feel free to interpret it your way.

Recommendation: Rain, lightning, waves are depicted in an extraordinary way for 1966.