Anime Based on Significantly Older Manga
Anime
To qualify for the list, the manga had to be at least 15 years old when the anime came out. Organized in ascending order by length of time between manga and anime. Each manga can only be accounted for once, so no remakes - those go on a separate list.
List is incomplete. Let me know if there are any big ones I'm missing. Thanks to everyone who has helped me add to this list.
Remake version: https://myanimelist.net/stacks/10193
Second remake version: https://myanimelist.net/stacks/58981
List is incomplete. Let me know if there are any big ones I'm missing. Thanks to everyone who has helped me add to this list.
Remake version: https://myanimelist.net/stacks/10193
Second remake version: https://myanimelist.net/stacks/58981

Special, 2004,
1 ep
Me:-
Author:-
Manga began in 1987 (17 years)

Movie, 1986,
1 ep
Me:-
Author:-
Manga began in 1967 (19 years)
*Note: There have been many anime which have adapted various chapters of Hi no Tori, none of which are necessarily remakes of each other and thus will not be included in these lists.
*Note: There have been many anime which have adapted various chapters of Hi no Tori, none of which are necessarily remakes of each other and thus will not be included in these lists.

TV, 1996,
373 eps
Me:-
Author:-
Manga began in 1976 (20 years)

ONA, 2021,
12 eps
Me:-
Author:6
Manga began in 1999 (22 years)

TV, 2018,
39 eps
Me:-
Author:6
Manga began in 1995 (23 years)

TV, 2016,
39 eps
Me:-
Author:7
Manga began in 1992 (24 years)

ONA, 2024,
1 ep
Me:-
Author:6
One-shot published in 1994 (30 years)