Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita


I've Been Killing Slimes for 300 Years and Maxed Out My Level

Edit
What would you like to edit?
 

Alternative Titles

Synonyms: Slime 300
Japanese: 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
English: I've Been Killing Slimes for 300 Years and Maxed Out My Level
German: I've Been Killing Slimes For 300 Years And Maxed Out My Level
Spanish: I've Been Killing Slimes For 300 Years And Maxed Out My Level
French: La Sorcière invincible tueuse de Slime depuis 300 ans
More titles

Information

Type: TV
Episodes: 12
Status: Finished Airing
Aired: Apr 10, 2021 to Jun 26, 2021
Premiered: Spring 2021
Broadcast: Saturdays at 21:00 (JST)
Licensors: None found, add some
Studios: Revoroot
Genres: ComedyComedy, FantasyFantasy
Themes: CGDCTCGDCT, IsekaiIsekai
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older

Statistics

Score: 6.901 (scored by 205169205,169 users)
1 indicates a weighted score.
Ranked: #48752
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #591
Members: 425,051
Favorites: 2,287

Available At


Resources


Streaming Platforms

6.90
Ranked #4875Popularity #591Members 425,051
Add to My List
Episodes: /12

Synopsis

In role-playing games, slimes are usually the easiest monster to kill, and because of that, they yield few experience points. But what would happen if you live long enough to keep defeating them for 300 years?

After many years of being a corporate slave, Azusa Aizawa abruptly passes away due to severe exhaustion. Seemingly headed for the afterlife, she meets a goddess who bestows her with immortality alongside a peaceful life in another world. There, Azusa enjoys her days tending to her farm, protecting the nearby village, and killing about 25 slimes per day—a routine that continues for at least three centuries.

However, this rather monotonous cycle begins to change when Azusa suddenly finds out that she has reached level 99—the maximum possible level—from slimes alone. Despite desperately trying to hide this fact in fear of ending her slow life, rumors of her strength spread nevertheless. Soon enough, various people throughout the continent, like the dragon Laika and the elf Halkara, start to appear at her doorstep—some seeking a battle, others asking for her assistance. Meeting friends and acquaintances who soon become family, Azusa finds she can live a life far better with others than when she was alone.

[Written by MAL Rewrite]

Characters & Voice Actors

Azusa

Main
Yuuki, Aoi
Japanese

Laika

Main
Hondo, Kaede
Japanese

Falfa

Main
Senbongi, Sayaka
Japanese

Halkara

Main
Harada, Sayaka
Japanese

Shalsha

Main
Tanaka, Minami
Japanese

Beelzebub

Supporting
Numakura, Manami
Japanese

Flatorte

Supporting
Waki, Azumi
Japanese

Pecora

Supporting
Tamura, Yukari
Japanese

Rosalie

Supporting
Sugiyama, Riho
Japanese

Vania

Supporting
Ozawa, Ari
Japanese

Staff



Edit

Opening Theme

Preview
Spotify
Apple Music
Amazon Music
Youtube Music
"Gudafuwa Every Day (ぐだふわエブリデー)" by Aoi Yuuki
Edit

Ending Theme

"Viewtiful Days!" by Azumi Waki

Episode Videos




Reviews

Jun 17, 2025
You know what? Why not? Let's make this review first before the 2nd season ends. From now on, I'm going to use the new format I did with the Koihime anime review. So, let's get started.

How did I find this?
I have told you guys in my previous review about ghosts in any story. I wanted to know how they handle them, because it's one of the most unique concepts of a story, where the ghost can change the story significantly by using the body of a human around them to tell the story.
So, yeah, I found this anime through YouTube, trying to find a new ...
Jun 8, 2025
Mixed Feelings
This show is essentially a comedy slice-of-life Isekai which is not concerned with adventure as much as generic wholesome character interactions. There is some adventure, but do not expect that to be the main appeal of the show. For a reference of another show which is similar in tone, the permise and concept is similar to Kuma-Kuma-Kuma bear, without the bear theme. To this end it is very effective, but it will probably not deliver on the usual OP MC Isekai fair, if that is what you are looking for. The show is much more relaxed and uninterested with genuine high-stakes battles.

The premise is quite ...
Jun 6, 2025
the only reason i watched this was the title because i like cheesy reincarnation animes where the protagonist is overpowered power but this was really boring i only finished it because i try to do that with all anime i watch but each time all i could think was “how many more episodes” it felt like i was only watching filler episodes there is no plot to it no goal no reason to watch the next episode and it is full of fan service and it wasn’t even good i was squeezing my eyes shut with cringe its a all women anime made by men

Interest Stacks

29 Entries · 223 Restacks
50 Entries · 11 Restacks

Recommendations

View All

Recent News

Second Season of 'Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita' Announced

Second Season of 'Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita' Announced

The GA Bunko and GA Novel 2022 New Year Anime Festival announced second anime season for Kisetsu Morita's Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni ...read more

'Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita' Announces Supporting Cast

'Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita' Announces Supporting Cast

The official Twitter account of the Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita (I've Been Killing Slimes for 300 Years and Maxed Out My ...read more


Recent Forum Discussion