Japan Synopsis
スライム倒して300年、知らないうちにレベルMAXになってました
After dying of overwork in the real world, I’m reincarnated as an immortal witch, and I spend 300 years enjoying a relaxing life. At some point, though, I end up at level 99! All those years spent killing slimes to make the money to pay the bills gave me a ton of experience points. Rumors of the level 99 witch spread, and soon I’m up to my ears in curious adventurers, duelist dragons, and even a monster girl calling me her mom! I’ve never been on an adventure, but I’m the strongest in the world… What’s going to happen to my relaxing life?!
The 2020–2022 Japan Window
452 Japan seriess released in this three-year window, ranked here by audience rating. I've Been Killing Slimes for 300 Years and Maxed Out My Level sits at position #90.
Other Titles From REVOROOT
Also On AT-X
Other series that aired on AT-X.
The 2020s Japan Landscape
Catalog density by release year in the 2020s. Highlighted year (yellow) is when I've Been Killing Slimes for 300 Years and Maxed Out My Level premiered. 539 total titles in this decade from Japan.
Broadcast Timeline
Reception Benchmarks
Ranked #550 of 4,579 Japan seriess indexed here (88th percentile by TMDB audience score).
Rating is +1.1 points above the Japan average of 6.9/10.
Among Japan Sci-Fi & Fantasy productions specifically: #217 of 758 (top 29%).
Production Details
| Primary Country | Japan |
|---|---|
| Original Language | Japanese |
| Production Companies | REVOROOT, Nippon Columbia, Hakuhodo DY Music & Pictures, SB Creative, Nippon BS Broadcasting |
| Series Type | Scripted |
| Seasons / Episodes | 2 / 12 |
| Release Date | April 10, 2021 |
| Official Site | slime300-anime.com |