Ranges, not promises. Assume eight to twelve hours a week of genuine study.
| Level | From the level below | Cumulative from zero |
|---|---|---|
| N5 | — | 3–6 months |
| N4 | 3–6 months | 6–12 months |
| N3 | 6–12 months | 1–2 years |
| N2 | 12 months or more | 2–3 years |
| N1 | 1–2 years or more | 3–5 years |
The gaps widen as you go up. N5 to N4 is more of the same. N4 to N3 doubles the vocabulary. N3 to N2 changes what the exam is asking you to do. N2 to N1 is another multiple again.
What moves you to the fast end
Hours, consistently. Twelve hours a week every week beats twenty hours in bursts. Almost all of the variance in these ranges is consistency rather than talent.
Already reading a non-Latin script. Learners who grew up with Devanagari, Burmese, Thai or another non-Latin writing system generally take to kana faster than those who have only ever read a Latin alphabet.
Living in Japan. Worth a great deal at N4 and N3, where the vocabulary is concrete and daily and you meet it constantly. Worth noticeably less at N2 and N1, where the vocabulary is abstract and lives in writing rather than in conversation.
Studying the exam, not the language in general. These are timed, multiple-choice papers with specific formats. Past papers under real timing are worth more per hour in the final months than general study.
What moves you to the slow end
Skipping kana. Learners who never make kana fully automatic pay interest on it at every subsequent level, because reading speed caps everything.
Avoiding listening. It improves on a timescale of months and is the most common cause of sectional failure. Deferring it does not delay the cost; it concentrates it at the point where nothing can be done.
Studying only what is enjoyable. Usually kanji and vocabulary, which feel productive, at the expense of listening, which does not.
Stopping between sittings. The JLPT runs twice a year. Candidates who stop for two months after a test, then restart, lose a meaningful fraction of what they built.
The honest bit about N2
Most learners who set out for N2 do not reach it, and the reason is almost never ability. It is that N3 to N2 takes a year of daily vocabulary work, and a year is long enough for life to intervene.
If you are planning for N2, plan for the year — including the months where it is dull. Why learners plateau covers what that period actually looks like and how people get through it.
If your goal is a visa rather than a level
Then these timelines are mostly not your problem, and it is worth saying so.
The Specified Skilled Worker language requirement is JFT-Basic 200+ or JLPT N4. JFT-Basic is A2, takes three to six months from zero, and runs roughly monthly rather than twice a year.
For anyone whose goal is to get to Japan and work, chasing a higher JLPT level first is usually the wrong order: it delays your arrival by years, and the language is far easier to build once you are there. See JFT-Basic or JLPT and how long to pass JFT-Basic.