Aterui

Every cinema or direct to video anime film that came out in 2002.

2001: https://myanimelist.net/stacks/34837
2003: https://myanimelist.net/stacks/34840

Disclaimer: There are a few hentai movies, that could be counted as well:
- 69 Pink Riders 2 (2002)
- Happy Day (2002)

Historical anime set in the Hein period + a few that feature Abe no Senmei.

The Heian era marked the height of Japan’s initial imperial aristocracy. With a strong focus on the arts, poetry, and literature; it cultivated the rise of samurai skilled in both aesthetics and battle. The Heian period essentially set the stage for the eventual shogunate and feudal period. Although seen as a rather peaceful era, it was actually rife with not all-out battles, but rather intrigue and power grabs behinds the scenes by the country’s most powerful and influential families; namely the Fujiwara, Genji (Minamoto), and Heike (Taira) clans.