Learn Japanese with Ace of the Diamond
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
The short answer: Ikkimi rates Ace of the Diamond N3 for learning Japanese: baseball words that repeat. 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 Ace of the Diamond 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 Ace of the Diamond?
Ikkimi rates Ace of the Diamond at N3 (everyday Japanese at full speed). What sets its level: baseball words that repeat. 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.
| Fact | Ace of the Diamond |
|---|---|
| Ikkimi’s level | N3 (everyday Japanese at full speed) |
| Why | baseball words that repeat |
| Japanese title | ダイヤのA |
| Format | TV series |
| Episodes | 75, about 24 minutes each |
| First aired | 2013 |
| Genres | Sports |
| Where to watch | Crunchyroll |
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, ダイヤのA, is a first lesson in itself. Its word, as a dictionary lists it:
| Word | Kana and romaji | Meaning |
|---|---|---|
| ダイヤ N3 | だいや daiya | diamond |
How to learn Japanese with Ace of the Diamond
Ikkimi lists Ace of the Diamond 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.
Add Ikkimi to Chrome
Get the extension from the Chrome Web Store and sign in.
Play an episode
Open Ace of the Diamond on Crunchyroll. The Japanese line appears on top of the video.
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.
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.
With 75 episodes on AniList’s entry, the same words get many chances to come back.
Easier and harder shows
Shows within a level of Ace of the Diamond, with the most genres in common first.
Easier
N4 to N3Horimiyaホリミヤcasual school talk, short scenesCrunchyrollNetflix
N4 to N3Spirited Away千と千尋の神隠しa film, some old-fashioned speechNetflix
N4 to N3Miss Kobayashi’s Dragon Maid小林さんちのメイドラゴンhome and office talk, one very polite speakerCrunchyroll
Also N3
N3Haikyu!!ハイキュー!!sports talk that repeats itselfCrunchyrollNetflix
N3Blue Lockブルーロックfootball words, shoutingCrunchyrollNetflix
N3Kuroko’s Basketball黒子のバスケbasketball words that repeatCrunchyrollNetflix
Harder
N3 to N2Chihayafuruちはやふるclub talk, classical poems read aloudCrunchyroll
N2Ping Pong the Animationピンポン THE ANIMATIONtable tennis words, clipped slangy speechCrunchyroll
N3 to N2HUNTER×HUNTERlong explanations of invented rulesCrunchyrollNetflix
See every N3 anime or all 192 anime by Japanese level, and read how to learn Japanese by watching anime from zero.
Questions
Is Ace of the Diamond good for learning Japanese?
With some help. Ikkimi rates it N3 (everyday Japanese at full speed). What sets its level: baseball words that repeat. 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 Ace of the Diamond?
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 Ace of the Diamond with Japanese subtitles?
Ikkimi lists Ace of the Diamond 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 ダイヤのA mean, word by word?
ダイヤ (daiya) means “diamond”.
How many episodes does Ace of the Diamond have?
AniList’s entry lists 75 episodes of about 24 minutes, first aired in 2013. Later seasons may be listed separately.
What should I watch before Ace of the Diamond?
Shows a little easier than Ace of the Diamond: Horimiya (N4 to N3), Spirited Away (N4 to N3) and Miss Kobayashi’s Dragon Maid (N4 to N3).
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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