Phoenix. Firebird. Hi no Tori. Tezuka considered this his masterpiece, his life’s work. This excellent little 3-part OVA (Original Video Animation) from 1986-87 adapted from parts of Tezuka’s original manga is heartbreakingly beautiful and required viewing for all students of Anime 101. Failing to do so will result in immediate expulsion from the program and may have future impact on your credit score, the release of intimate photographs, bank numbers, terrible secrets, etc.
Bottom line: you MUST at least watch the first chapter. Or else.