No language makes the case for spaced repetition more plainly. Learning 2,136 jōyō kanji, each with multiple readings and a set of compounds, is a memory problem before it is a language problem — which is why the SRS tradition in language learning grew up around Japanese in the first place. Retrieval on a widening schedule is the only approach that holds a set that large without daily review of everything.
Why spaced repetition suits Japanese
The Japanese writing system
Japanese uses hiragana and katakana — two 46-character syllabaries — alongside kanji, of which roughly 2,136 are designated for everyday use. Most kanji carry several readings depending on context, so a single character is not one fact but a small cluster of them.
What English speakers find hard about Japanese
- Kanji readings: the same character is read differently in isolation and in compounds.
- Pitch accent, unmarked in ordinary writing and rarely taught, but audible to native speakers.
- Politeness levels that change verb forms and vocabulary according to social context.
- Counters — a different word depending on whether you are counting flat things, long things, or animals.
Cards you might meet
Generated from whatever theme you name — these are the kind of thing that comes back.
木漏れ日
sunlight filtering through leaves
komorebi
よろしくお願いします
a set phrase of goodwill with no direct translation
懐かしい
nostalgic, fondly familiar
面倒くさい
too much bother
お疲れ様
acknowledgement of someone’s effort
What you get
- SM-2 scheduling with four grades and keyboard shortcuts
- Generated Japanese vocabulary on any theme you name
- Pronunciation for every card
- Grammar sets from A1 to C2
- Writing feedback on your own sentences
- Photo vocabulary — name what is in front of you
Popular Japanese themes
everyday lifefoodwork & officetraveltechnology
Japanese questions
- Can I use Language Flash for kanji?
- Yes. Generated cards use natural Japanese including kanji, and you can theme a session around a topic to get characters in context rather than in isolation. Note that it is a general SRS app, not a dedicated kanji curriculum with stroke order and radical breakdowns.
- Does Japanese have verb conjugation drills?
- No. Japanese verbs inflect for politeness and aspect rather than for person, so the person-based conjugation drill does not apply and is hidden when Japanese is your target. Vocabulary review, grammar sets, the diary and photo vocabulary all work normally.
- How long does Japanese take?
- The Foreign Service Institute places Japanese in its hardest category for English speakers, at roughly 2,200 class hours. The writing system accounts for much of that, which is the part scheduled review helps with most.