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Learn Japanese with That Time I Got Reincarnated as a Slime

How hard its Japanese is, real words from it with kana and romaji, where to watch it, and what to watch before and after.

Last updated 30 October 2026

Anime by Japanese level › N3

The short answer: Ikkimi rates That Time I Got Reincarnated as a Slime N3 for learning Japanese: clear narration, game-like fantasy words. Good for a beginner? With some help. It sits in the middle of Ikkimi’s levels. A beginner can follow it with kana and romaji on every word, but it is easier after one or two simpler shows.

Ikkimi lists That Time I Got Reincarnated as a Slime on Crunchyroll. What each service carries varies by country. On Crunchyroll, Ikkimi finds a Japanese subtitle file for the episode in Jimaku’s catalogue and lines it up for you.

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How hard is the Japanese in Reincarnated as a Slime?

Ikkimi rates Reincarnated as a Slime at N3 (everyday Japanese at full speed). What sets its level: clear narration, game-like fantasy words. Of the 192 anime Ikkimi rates by hand, 44 are easier and 80 are harder.

Levels follow the Japanese Language Proficiency Test, from N5 (easiest) to N1 (hardest). They are Ikkimi’s estimate of how hard a show’s Japanese is to follow, from how fast people talk, how many unusual words there are and how clear the voices are. They are not official JLPT ratings.

FactThat Time I Got Reincarnated as a Slime
Ikkimi’s levelN3 (everyday Japanese at full speed)
Whyclear narration, game-like fantasy words
Japanese title転生したらスライムだった件
FormatTV series
Episodes24, about 24 minutes each
First aired2018
GenresAction, Adventure, Comedy, Fantasy
Where to watchCrunchyroll

Format, episodes, year and genres are from AniList’s entry, which may cover only the first season.

The words in the title

The Japanese title, 転生したらスライムだった件, is a first lesson in itself. Its 3 words, as a dictionary lists them:

WordKana and romajiMeaning
転生 てんせい tenseireincarnation; rebirth; transmigration
スライム すらいむ suraimuslime
件 けん kenmatter; affair; case

How to learn Japanese with Reincarnated as a Slime

Ikkimi lists Reincarnated as a Slime on Crunchyroll. What each service carries varies by country. Ikkimi does not stream anything: you watch on your own account, in Chrome on a computer, and Ikkimi adds a Japanese line you can click on top of the player.

On Crunchyroll

Crunchyroll rarely has Japanese subtitles. On a Crunchyroll episode, Ikkimi looks for a matching Japanese subtitle file in Jimaku’s public catalogue, loads it and lines it up with the episode by itself. If Jimaku has no file for an episode, you can search by hand in the Ikkimi popup or load a subtitle file from your computer.

  1. Add Ikkimi to Chrome

    Get the extension from the Chrome Web Store and sign in.

  2. Play an episode

    Open Reincarnated as a Slime on Crunchyroll. The Japanese line appears on top of the video.

  3. Click the words you keep hearing

    The video pauses and the word opens: kana, romaji, meaning, JLPT level and a recording by a native speaker where one exists (never a computer voice; otherwise the line from the show plays again). Keep three to five words an episode, the ones that come up again.

  4. Review them later

    Kept words come back as flashcards on the Ikkimi website, with the scene and the line they came from, just before you would forget them.

Easier and harder shows

Shows within a level of Reincarnated as a Slime, with the most genres in common first.

Easier

  • N4 to N3Dragon Ballsimple adventure talk, shoutingCrunchyroll
  • N4 to N3Digimon Adventurechildren talking, monster names that repeatCrunchyroll
  • N4Pokémonmade for children, simple adventure talkNetflix

Also N3

  • N3ONE PIECEloud and clear, pirate words that repeatCrunchyrollNetflix
  • N3Narutoclear voices, ninja words that repeatCrunchyrollNetflix
  • N3Black Clovermagic words that repeat, a lot of shoutingCrunchyrollNetflix

Harder

See every N3 anime or all 192 anime by Japanese level, and read how to learn Japanese by watching anime from zero.

Questions

Is Reincarnated as a Slime good for learning Japanese?

With some help. Ikkimi rates it N3 (everyday Japanese at full speed). What sets its level: clear narration, game-like fantasy words. It sits in the middle of Ikkimi’s levels. A beginner can follow it with kana and romaji on every word, but it is easier after one or two simpler shows.

What Japanese level is Reincarnated as a Slime?

N3, on Ikkimi’s scale from N5 (easiest) to N1 (hardest). Of the 192 anime Ikkimi rates by hand, 44 are easier and 80 are harder. The level is Ikkimi’s estimate, not an official JLPT rating.

Where can I watch Reincarnated as a Slime with Japanese subtitles?

Ikkimi lists Reincarnated as a Slime on Crunchyroll. What each service carries varies by country. Crunchyroll rarely has Japanese subtitles, so Ikkimi looks for a matching file in Jimaku’s catalogue and lines it up with the episode.

What does the title 転生したらスライムだった件 mean, word by word?

転生 (tensei) means “reincarnation; rebirth; transmigration”; スライム (suraimu) means “slime”; 件 (ken) means “matter; affair; case”.

How many episodes does Reincarnated as a Slime have?

AniList’s entry lists 24 episodes of about 24 minutes, first aired in 2018. Later seasons may be listed separately.

What should I watch before Reincarnated as a Slime?

Shows a little easier than Reincarnated as a Slime, with genres in common: Dragon Ball (N4 to N3), Digimon Adventure (N4 to N3) and Pokémon (N4).

Sources: show details from AniList; meanings from JMdict (EDRDG, CC BY-SA 4.0); readings and word splits from kuromoji.js with IPADIC; JLPT word levels from Jonathan Waller’s unofficial lists. See Credits. Spotted a mistake? Tell us at hello@ikkimi.app.

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