When most people hear the name Osamu Tezuka, they think of wide-eyed robots (Astro Boy), jungle adventures (Kimba the White Lion), or whimsical medical dramas (Black Jack). But in 1969, Tezuka — the so-called “God of Manga” — shocked audiences with something very different: a psychedelic, erotic, and adult-oriented animated film called A Thousand and…