How to Use Flashcards for JLPT Kanji (N5–N3) — the Spaced Way

Flashcards work — if you space them correctly. Every JLPT learner eventually meets spaced repetition (SRS), but most use it wrong: they either cram 200 kanji the week before the test or review everything daily until they burn out. Both fail.

The kanji counts, so nothing surprises you

That's ~650 kanji by N3. At 10 new cards/day you'll need 65 days of pure acquisition — spaced repetition exists because human memory forgets faster than that.

Why spacing works (the science in one paragraph)

Memory is not a bucket — it's a curve. Every time you recall something just as you're about to forget it, the curve flattens dramatically. Review too early = wasted time; too late = relearn from scratch. Spaced repetition puts each review right at the forgetting edge: Again (1 day), Got it (6 days), then stretching intervals of weeks as the item hardens.

The two failure modes to avoid

1. Cram, forget, repeat — massing 200 kanji in a weekend gives you a great score on day 2 and nothing on day 200.
2. Review everything, forever — reviewing kanji you mastered 3 months ago daily eats hours that new kanji need. SRS exists to eliminate exactly this review waste.

The habit loop that survives

1. Same time, same place — flashcards pair best with an existing anchor (morning coffee, commute)
2. Small daily dose — 15–30 cards beat 200 on Sunday
3. Rate honestly — when you almost knew a kanji, rate it "didn't know." Flattering yourself defeats the algorithm
4. Don't skip 2 days in a row — the single habit-killer (day 3 becomes day 30)

Use your actual mistakes as cards

The highest-value flashcards aren't generic decks — they're cards built from your own wrong answers. A kanji you got wrong in a real practice test carries context (which sentence tripped you, what distractor fooled you) that a random deck card lacks.