Tensura Nikki: Tensei shitara Slime Datta Ken

The Slime Diaries: That Time I Got Reincarnated as a Slime

What would you like to edit?

Alternative Titles

Japanese: 転スラ日記 転生したらスライムだった件
English: The Slime Diaries: That Time I Got Reincarnated as a Slime
German: The Slime Diaries
Spanish: The Slime Diaries
French: The Slime Diaries
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Apr 6, 2021 to Jun 22, 2021
Premiered: Spring 2021
Broadcast: Tuesdays at 23:00 (JST)
Licensors: None found, add some
Studios: 8bit
Source: Manga
Genres: ComedyComedy, FantasyFantasy, Slice of LifeSlice of Life
Themes: IsekaiIsekai, ReincarnationReincarnation
Demographic: ShounenShounen
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.581 (scored by 112432112,432 users)
1 indicates a weighted score.
Ranked: #14142
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #742
Members: 269,449
Favorites: 1,883

External Links

Streaming Platforms

Ranked #1414Popularity #742Members 269,449
Add to List
Episodes: /12
* Your list is public by default.


In between slaying monsters and negotiating with neighboring countries, Rimuru Tempest has his hands full attending to his kingdom alongside day-to-day matters. But whether it's expanding the farms in the summer heat or shoveling snow in the chilly winter, no task is too big for Rimuru and his friends!

[Written by MAL Rewrite]


Tensura Nikki: Tensei shitara Slime Datta Ken was initially scheduled to begin airing in January 2021, but it was delayed for three months due to the COVID-19 pandemic.

Episode Videos

Related Anime

Characters & Voice Actors

Tempest, Rimuru

Okasaki, Miho

Nava, Milim

Hidaka, Rina


Senbongi, Sayaka


Ichimichi, Mao

Tempest, Veldora

Maeno, Tomoaki


Furukawa, Makoto

Izawa, Shizue

Hanamori, Yumiri


Kobayashi, Chikahiro


Eguchi, Takuya


Tomari, Asuna


Haibara, Yuuji
Terashima, Takuma
Theme Song Lyrics
Kumada, Akane
Theme Song Performance
Original Creator


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Brand new diary" by Akane Kumada

Ending Theme

1: "Brand new diary" by Akane Kumada (eps 1)
2: "Kamona Tempest! (カモナ・テンペスト!)" by Rimuru (Miho Okasaki), Great Sage (Megumi Toyoguchi), Veldora (Maeno Tomoaki), Shuna (Sayaka Senbongi), Shion (M.A.O), Ranga (Chikahiro Kobayashi), Gobuta (Asuna Tomari) (eps 2)
3: "Oyasumi Orange (おやすみオレンジ)" by Rimuru (Miho Okasaki) (eps 3)

Jun 22, 2021
Stark700 (All reviews)
Spinoffs made these days carries a certain level of risk and this is especially true for fans of their favorite franchises. This can apply to any media, whether it's anime, live action movies or TV shows, and even video games. Being loyal to a brand is part of our DNA and although not everyone follows that mindset, spinoffs usually at the very least must fundamentally meet the expectations of the what it tries to sell.

What does that tell you about Tensura Nikki: Tensei shitara Slime Datta Ken? Well, it is a spinoff and is based on the TenSura franchise set in the same universe. The read more
Jun 22, 2021
KANLen09 (All reviews)
If there was one way to summarize this spin-off, it'd be: "How good and pleasant it is when we, the denizens of Tempest, dwell together in unity, to praise and commune with the Great Rimuru-sama".

Ever since the announcement (and eventual airing of the 1st Cour) of Season 2 of TenSura, fans have been kinda complaining that the source material's adaptation have been wishy-washy, as if to premonition the events of what Season 2 will be carrying forward for the franchise, and leaving what's left of Season 1's smaller and minor contents behind for the "greater good". Well fear no more, because this spin-off (which is read more
Jun 22, 2021
ren0080 (All reviews)
I don't usually like spin-offs, and this is one of those that I don't like.
I just don't get why they make a series (spin-off) that doesn't really accomplish anything.
This is just a bad spin-off because it is strictly maintaining the anime's status for it's characters. Meaning, they keep the characters same throughout this spin-off so that it won't contradict with the main series. And it's not that it's bad, it's just that this entire spin-off is pointless because it didn't accomplish anything. No character developed nor story progressed. There's no meaning to this spin-off existing.
If it was like at least 12 minutes per episode, read more
Jun 22, 2021
tensura1704 (All reviews)
After the completion of Tensura S2 part 1 (Also known as That Time I Got Reincarnated as a Slime or Tensei shitara Slime Datta Ken) many of us thought that this spin off is the continuation of the story. But it's not!! This spin off is 100% different (Also not related to Main story). It deepens the bond between the characters...


Well, to be frank, everyday is a new story in our life. This story main theme is about daily lives of them. How Rimiru works in the town, what will they do at free time, parties and festivals. I really love how they showed their read more

Interest Stacks

41 Entries · 9 Restacks
by bufi_
23 Entries · 2 Restacks
33 Entries · 17 Restacks


Recent News

Spring 2021 Simulcast List [Update 4/19]

Spring 2021 Simulcast List [Update 4/19]

In this thread, you'll find a comprehensive list of anime acquired for simulcast release during the Spring 2021 season. Anime series licensed for home video rel...read more

Spring 2021 Preview

Spring 2021 Preview

In this thread, you'll find a comprehensive list of Spring 2021 titles with an accompanying promotional video (PV), commercial (CM), or trailer. This post will ...read more

Recent Forum Discussion

Rimuru Tempest is a guy not a girl ( 1 2 )
R1an-sama - Apr 27, 2021
91 replies by Spider__Robins »»
Jun 2, 9:59 AM
Poll: Tensura Nikki: Tensei shitara Slime Datta Ken Episode 11 Discussion ( 1 2 )
Stark700 - Jun 15, 2021
51 replies by Graymanes »»
Mar 16, 9:50 PM
When can or should I watch this?
Ecarteo - Feb 6
15 replies by Ciste »»
Feb 9, 1:28 PM
Poll: Tensura Nikki: Tensei shitara Slime Datta Ken Episode 1 Discussion ( 1 2 3 )
Stark700 - Apr 6, 2021
113 replies by lasodamos »»
Jan 7, 3:17 PM
Poll: Tensura Nikki: Tensei shitara Slime Datta Ken Episode 8 Discussion
Stark700 - May 25, 2021
38 replies by liljames326 »»
Dec 27, 2021 6:15 PM

Recent Featured Articles

That Time I Got Reincarnated as a Slime: ISEKAI Memories Anniversary

That Time I Got Reincarnated as a Slime: ISEKAI Memories Anniversary

Slime ISEKAI Memories is holding a new event, Isekai Revelry, to celebrate the game’s six-month anniversary!

by MAL_editing_team