KnowHow · Japanese

The best way to learn Japanese, per NoaLingua

An honest comparison of the routes, including the ones we do not sell

The routes differ less than the marketing suggests. What works is a textbook base for the first few months, then a large volume of real material you can actually parse, plus spaced retrieval for kanji readings. Attrition, not method, is what defeats people in Japanese.

Written by Nemanja Pejić Founder and developer of NoaLingua

Published 26 August 2026

NoaLingua for Chrome

Where NoaLingua fits, and where it does not

NoaLingua covers one part of the shape below: making real Japanese parseable earlier than it otherwise would be, and stopping the readings you meet from evaporating. It is a Chrome extension, it is free, and it needs no account.

It is not a course, it does not teach kana, and it will not talk to you. In a 2,200-hour language it would be dishonest to pretend a browser extension is the plan — it is the part that runs alongside the plan, on the hours you were spending anyway.

Real material, parseable earlier: Two subtitle lines, word boundaries resolved by a click, readings in context, and the same behaviour inside articles and PDFs.
Retrieval without deck-building: Saved sentences return on a spaced schedule with their context. No cards to format, no deck to maintain — which matters more the longer the language takes.
What it is not: No curriculum, no kana teaching, no conversation partner, no mobile app. In Japanese those gaps are significant and this page is the place to say so.

Add to Chrome — Free Add to Chrome Opens the Chrome Web Store listing NoaLingua — beyond dual subs: video, web, PDF — free, no account, Chrome 138 or newer.

The shape that works in a long language

Japanese rewards a different balance from Spanish, because the opening is mechanical and the middle is enormous. The first three months are best spent on a structured base — kana, core sentence patterns, the first few hundred words — where a textbook genuinely outperforms improvisation. After that the balance flips hard toward volume of real input, and stays there for years.

The third ingredient is retrieval, and Japanese needs it more than most languages. A kanji reading has fewer surrounding cues to reconstruct it from than a European word does, so what you do not deliberately review is more completely gone.

The routes, honestly

Each of these is good at one part of the shape and oversold as good at all of it. The useful question is which part you are currently missing.

A textbook (Genki, Tae Kim and similar): The best value in the first three months, because Japanese has a genuinely correct starting order and a textbook knows it. Diminishing returns after that, and finishing one is not a goal.
Apps: Good for drilling kana in week one and for a daily habit. Poor at everything after, because they cannot supply the volume of real sentences the middle of Japanese requires.
A class: Buys structure and a deadline, and deadlines work. Paced for a group, and rarely supplies enough input on its own.
Immersion in Japan: Very effective with a base, and unusually easy to waste without one — a great many people live in Japan for years while functioning in English.
Anime and drama as material: Genuinely good input if you can parse it, and the register matters: slice-of-life and school settings teach usable modern Japanese, period drama teaches speech nobody uses.

Attrition is the real opponent

In a 600-hour language, method differences show up in the result. In a 2,200-hour language they are swamped by whether you are still doing it in year three, and almost every Japanese failure is an abandonment rather than a plateau.

That reframes the choice. The best route is the one you will still be running in two years, which usually means material you would consume regardless, sessions short enough to survive a bad week, and a review system you do not have to maintain by hand. Optimising the method while ignoring the attrition is the standard mistake.

What the evidence says

Each of these has a source and a date. Where we could not find one, the claim is not here.

Japanese needs about 2,200 class hours to reach General Professional Proficiency.: It sets the scale every route has to fill, and it is why sustainability beats intensity here more decisively than in a Category I language. US Foreign Service Institute language difficulty categories, checked 2026-08-26
New material decays sharply within the first day unless it is retrieved again.: The argument for building retrieval into the routine rather than adding it later — particularly for kanji readings, which have the fewest cues to rebuild from. Ebbinghaus’s forgetting curve, summarised with sources on our blog
Acquisition is driven by input the learner can mostly understand.: In Japanese, "mostly understand" has an extra precondition — you must be able to see where the words are — which is why support while reading matters more here. Krashen’s Input Hypothesis, summarised with sources on our glossary

From people who have done it

Time to proficiency is driven far more by how different the language is from your own than by aptitude or method.

The US Foreign Service Institute Has taught languages to American diplomats since 1947 FSI language difficulty categories
Learners acquire a language by understanding messages slightly beyond their current level, not by studying the rules of the language first.

Stephen Krashen Linguist; the Input Hypothesis underpins comprehensible-input teaching The Input Hypothesis, summarised on our glossary page

Common questions about NoaLingua

Is Anki necessary for Japanese?

Spaced repetition is close to necessary; Anki specifically is not. What matters is that readings come back before you lose them. Anything that does that works, and anything that does not will cost you hours re-learning.

Should I do RTK — Remembering the Kanji?

It works for some people and it is a large upfront cost that produces no ability to read Japanese by itself. Meeting kanji inside real words is the lower-risk route, and the one that keeps you in contact with the actual language.

Is a tutor worth it for Japanese?

For speaking, yes — nothing else reliably supplies it. Bring sentences you have met rather than grammar questions you could have read, or you will pay conversation rates for a textbook.

How much Japanese a day is enough?

Whatever you can sustain for years. Thirty daily minutes beats three weekly hours because of what is forgotten in the gaps, and in a 2,200-hour language the gaps are where the plan dies.

Try NoaLingua on the next video you were going to watch anyway.

Free, with every feature. No account, nothing to cancel, and your deck stays on your machine.