Not including short-form (i.e. less than 30 minutes per episode) anime, @anime_local says that in the spring of 2018, 42 late-night anime TV series debuted.
The tables began turning in the late 1990s, though, and now the vast majority of anime exists as late-night TV programming.
However, Japanese Twitter user @anime_local says that while the late-night anime bubble hasn’t popped, the swelling is about to go down considerably.
This year, though, that number is currently down almost 65 percent, with only 15 late-night series currently confirmed for spring 2019 premiers, according to @anime_local’s count.