Sugata Sanshirou

Collection of historical semi-realistic (minimal fantasy) or realistic (no superpowers or fantasy) works that detail the historical events of Japan or daily life of people in Japanese historical context.

Reference:

794 – 1185 - Heian period
1185 – 1336 - Kamakura period
1336 – 1573 - Muromachi period
1336 – 1392 - Nanbokucho period
1467 – 1590 - Sengoku period
1568 – 1603 - Azuchi-Momoyama period
1603 – 1868 - Edo period
1853 – 1868 - Bakumatsu (final years of the Edo period)
1868 – 1912 - Meiji period
1912 – 1926 - Taisho period
1926 – 1989 - Showa period
1989 – 2019 - Heisei period

Series and films that feature live action aspects or footage to enhance the animated experience.

from here:
https://w.atwiki.jp/sakuga/pages/100.html

This part covers 1943-1983
Part 2 coming soon, whenever I finish it.

I'm not knowledgable about all of these, as the list wasn't originally made by me, so some entries are missing detailed descriptions. Sorry about that.

Every cinema or direct to video anime film that came out in 1981.

1980: https://myanimelist.net/stacks/34002
1982: https://myanimelist.net/stacks/34007

Missing on MyAnimeList:
- Horikawa Hiromichi 堀川弘通 (1916-2012), "Mister Giants Eikō no Sebangō 3" ミスター・ジャイアンツ 栄光の背番号３(Mister Giants Glory Number 3), Japan, 1981.
- Kim Seong-chil 김성칠, "Gugugui taeyang seongung isunsin" 구국의 태양 성웅 이순신 (Sun-Shin Yi, the Sun of Salvation), South Korea, 1981.