The Japanese Anime I have watched as they aired that ended in the Winter 2020 broadcast season (From around the beginning of January 2020 to around the end of March 2020).
Shows are listed as their separate 'seasons' to conform with Japanese series formatting, see any attached notes.
Best overall:
Keep Your Hands Off Eizouken!
Best animation:
Keep Your Hands Off Eizouken!
Somali and the Forest Spirit
Best story:
Keep Your Hands Off Eizouken!
Dorohedoro
Best music:
Keep Your Hands Off Eizouken!
Most surprising:
Keep Your Hands Off Eizouken!
Japanese Anime I have watched that I think are excellent.
My Anime Report Card (Winter 2020)
by Aeron