Typed Japanese is live · free · last verified 6 Nov 2026 · viability monitor
Typed Japanese
Typed Japanese teaches Japanese grammar with type-checked TypeScript examples across 47 chapters.
If you think in rules, types or conditionals, this is the cleanest free read on how Japanese particles lock together. The compiler proves sentences instead of asserting them, and the analyzer makes each particle inspectable. It's grammar-only and text-only, so bring your own listening and speaking practice.
Verdict generatedVerified 8d ago · liveness 60/100 · cite: rightaichoice.com/tools/typed-japanese
- Programmers and engineers curious about Japanese grammar who think in types
- Self-taught learners who want systematic, rule-based explanations over memorisation
- Intermediate learners grinding through keigo, passive and causative forms
- Bilingual learners comfortable in English or Simplified Chinese
- Learners who need audio, speaking or listening practice
- Anyone wanting a mobile app or offline study
- Immersion-first or conversation-led learners
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Skip Typed Japanese if you want listening or speaking practice in the same tool — its 47 chapters are text and types only, with no audio and no pronunciation feedback, so you'd still need a separate speaking resource.
Typed Japanese is a free browser course with no signup, so there is no tier ladder to climb and no per-seat maths. Its natural comparison is paid structured courses and paid grammar references, which typically charge monthly for similar reading-and-grammar depth but bundle audio the free version of Typed Japanese does not include.
In short
Typed Japanese — Typed Japanese teaches Japanese grammar with type-checked TypeScript examples across 47 chapters. Best for Programmers and engineers curious about Japanese grammar who think in types, Self-taught learners who want systematic, rule-based explanations over memorisation, Intermediate learners grinding through keigo, passive and causative forms. Free to use.
What is Typed Japanese?
Typed Japanese — Typed Japanese teaches Japanese grammar with type-checked TypeScript examples across 47 chapters. Best for Programmers and engineers curious about Japanese grammar who think in types, Self-taught learners who want systematic, rule-based explanations over memorisation, Intermediate learners grinding through keigo, passive and causative forms. Free to use.
Typed Japanese is a browser-based Japanese grammar course where every example sentence is a TypeScript type the compiler actually checks. You don't trust a translation; you watch the code confirm the sentence is well-formed. Forty-seven chapters run from beginner to advanced, written at equal depth in English and Simplified Chinese, no signup required. The method is deliberately odd and it works: instead of drilling a phrase until it feels right, you see は, なら and そうした labelled as typed pieces and assembled under constraints. An interactive analyzer lets you pull any example apart particle by particle, so each grammar point shows its parts. Named conjugation forms (Ta, Te, Masu) match what a textbook calls them. The curriculum follows dependency order: 20 elementary chapters on particles, verbs and the て-form; 15 intermediate on passive, causative and the full keigo system; 12 advanced on business keigo, nuanced suffixes and formal written style. Real sentences come first, then the form that makes them sayable. This sits on the structure-and-grammar layer only. It's the open-source sibling of Typed Korean and the Kotone lyrics player, all built by Typed Grammar on the same checked-not-guessed premise. Alternatives lean on spaced repetition or graded reading; this one leans on proof.
Key features
- 47 Japanese grammar chapters from beginner to advanced
- Every example sentence written as a type-checked TypeScript snippet
- Interactive analyzer to break any sentence down particle by particle
- Dependency-ordered curriculum: 20 elementary, 15 intermediate, 12 advanced
- Full keigo system taught through type annotations
- Passive and causative conjugation as typed constructs
- Giving and receiving verbs, appearance and hearsay patterns
- Conditionals, transitivity and sentence connectives
- Conjugation forms named in English (Ta, Te, Masu)
- Grammar points motivated by a real situation before the mechanics
- Bilingual content in English and Simplified Chinese
- Business keigo plus formal and literary written style
- Runs entirely in the browser with no signup
- Open source on GitHub
- Sibling tools: Typed Korean course and Kotone macOS lyrics player
Behind the verdict
We'd reach for Typed Japanese the moment a learner says they want the rules, not the vibes. The 47 chapters run from は and です through business keigo, and the compiler checks each sentence, so you're never taking the author's word that a phrase is grammatical. That's a genuinely different filter than most grammar apps apply. The people who click with it tend to be programmers or otherwise systems-minded folk. If you already reason in conditionals, seeing ヒンメルならそうした typed as ConditionalPhrase over named parts lands faster than a page of prose. The particle-by-particle analyzer is the useful part: open any example, strip it down, watch which pieces a form requires. Where it bites: this is grammar and structure only. No audio, no speaking drills, no listening. If your goal is conversation or immersion, this is a companion, not a course you finish alone. Browser-only, no mobile app or offline mode mentioned. English and Simplified Chinese only, at equal depth. Intermediate learners stuck on keigo, passive and causative get the most out of it, since those chapters assume you've cleared the elementary ground. Beginners can start at zero, but text-first learners who want sound cues will struggle. The closest analog is any rule-based reference or a graded reader; those explain in words and lean on repetition. Typed Japanese explains in types and leans on verification. If that framing sounds like a gimmick, it probably isn't for you. If it sounds like relief, start at chapter one.
Limitations
- Typed Japanese is a browser-based, open-source Japanese grammar course of 47 chapters spanning elementary to advanced material (including keigo and literary/formal style), taught by writing each example sentence as a TypeScript type that the compiler checks.
- The TypeScript framing is the pedagogical core, which adds friction for learners unfamiliar with type annotations.
- It runs entirely in the browser with no signup, described as text/code-based course material rather than a conversational tool.
as of 2026-10-13
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Is Typed Japanese still active?
Typed Japanese is live · free · last verified 6 Nov 2026 · viability monitor.
Viability score
How well maintained and how widely used is Typed Japanese? Built from what the vendor actually publishes (docs, changelog, tutorials, integrations, pricing), whether the site is live, and how much real users discuss it. How we calculate this
Last calculated: November 2026
How we score →What do users say about Typed Japanese?
What people actually say about Typed Japanese — is it worth it?
Our community sentiment research written Jul 14, 2026 is more than 90 days old, so it is being re-reviewed against current data and is not shown.
How we verified this
Every listed fact about Typed Japanese — pricing, features, links, status — is re-read from the vendor's own pages by our verification pipeline and each change is logged with a date; the last pass ran on 6 Nov 2026. Analysis is drafted with AI models and checked against our editorial standards before publishing; see how we verify.
Verification history
We have re-verified Typed Japanese 14 times since . Each pass re-reads the vendor's own pages and re-checks every listed field against that evidence; passes where nothing had changed are marked as such.
- — changed who should skip it, summary, features, pricing tiers, who it suits, description, our verdict
- — changed pricing page, limitations
- — changed summary, pricing tiers, description, our verdict, features
- — changed SSL certificate
- — changed our verdict, description, pricing tiers, who it suits, summary, who should skip it
- — changed limitations
Showing the 6 most recent of 14 verification passes.
Free to cite with attribution — this page re-verifies continuously.
How much does Typed Japanese cost in 2026?
Typed Japanese: Free to use. Pricing last verified 6 Nov 2026.
Plans compared
Every published Typed Japanese tier, its price as the vendor publishes it, who it fits, and what it adds over the tier below. The 12-month cost projection follows.
| Plan | Price | Billing | Who it's for |
|---|---|---|---|
| Free | Free | — | Programmers and self-taught learners who want a deep, systematic Japanese grammar course without paying or signing upAdds: Starting tier — the entire 47-chapter course, the interactive analyzer, and both language versions, all in the browser |
12-month cost
Project the real annual outlay, including the implied monthly cost when only an annual tier is published.
Vendor list price only. Add-on usage, seat overages, and contract minimums are surfaced under Hidden costs & gotchas.
Where the pricing makes sense
The company stage and team size where Typed Japanese's pricing actually pencils out — and where peers do it cheaper.
Typed Japanese is a free browser course with no signup, so there is no tier ladder to climb and no per-seat maths. Its natural comparison is paid structured courses and paid grammar references, which typically charge monthly for similar reading-and-grammar depth but bundle audio the free version of Typed Japanese does not include.
Has Typed Japanese's pricing changed?
No plan price for Typed Japanese has moved since we began logging in Aug 2026; the pricing page is re-read on every verification pass.
Who should pick Typed Japanese?
Pick Typed Japanese if you are Programmers and engineers curious about Japanese grammar who think in types, Self-taught learners who want systematic, rule-based explanations over memorisation, Intermediate learners grinding through keigo, passive and causative forms, Bilingual learners comfortable in English or Simplified Chinese.
Look elsewhere if you are Learners who need audio, speaking or listening practice, Anyone wanting a mobile app or offline study, Immersion-first or conversation-led learners, Learners who want streaks, community forums or social features.
Skip it if Skip Typed Japanese if you want listening or speaking practice in the same tool — its 47 chapters are text and types only, with no audio and no pronunciation feedback, so you'd still need a separate speaking resource.
GeneratedReal-world workflow fit
Concrete scenarios for the personas Typed Japanese actually fits — and what changes day-one when you adopt it.
You open chapter one on your laptop, work through は and です, then hit a sentence whose particles you can't parse — you open the analyzer, pull it apart particle by particle, and see how the type is composed before moving on.
Outcome: You build a structural model of noun sentences and particles in the same notation you already use at work, without installing anything or creating an account.
You jump straight to the intermediate chapters covering polite, humble and honorific registers, then use the analyzer on a business keigo example to see how the same proposition is re-typed across registers.
Outcome: Keigo stops being a memorised table and becomes a set of forms you can reproduce deliberately in the right context.
You read the English explanation of a conditional, then switch to the 简体中文 version of the same chapter when the nuance is finer than the English conveys, using the shared type-checked examples as the anchor.
Outcome: You get grammar explanations in whichever language you think in that day without losing the worked examples.
Use cases
- See why a Japanese sentence is wrong by watching it fail to type-check
- Break a keigo sentence into polite, humble and honorific forms via type annotations
- Work through passive and causative conjugations step by step in the analyzer
- Internalise the many functions of the て-form through interactive breakdowns
- Build a mental model of Japanese sentence structure from は/です up to literary patterns
- Use as a structured supplement alongside a textbook or spaced-repetition deck
- Jump straight to whichever chapter covers the grammar that is blocking you
- Study Japanese grammar bilingually in English or Simplified Chinese
Setup time & first value
How long it actually takes to get something useful out of Typed Japanese — broken out by persona, not the marketing-page minute.
Nothing to install and no signup — open the site and start chapter one in under a minute. Learners who already read TypeScript reach useful value in the first chapter; those new to type annotations should budget an extra chapter or two to get comfortable with the notation before the Japanese load ramps up.
Switching to or from Typed Japanese
How to bring data in from common predecessors and how to get it back out — written for the switcher, not the buyer.
- →From a textbook grammar appendix: open the chapter that covers the form you're stuck on and work the analyzer on the examples instead of rereading the table
- →From a spaced-repetition deck: keep the deck for vocabulary and use Typed Japanese as the grammar layer the cards don't explain
- →From a paid structured course: use Typed Japanese to fill the reading-grammar gaps when a lesson skips the structure behind an example
- ↗To a listening or conversation tool: move your speaking and listening practice there while keeping Typed Japanese as the grammar reference
- ↗To a textbook: use Typed Japanese chapters to pre-learn a form, then work the textbook's exercises for volume
- ↗To Typed English: follow the same type-as-sentence approach on the companion course if you're also working on English grammar
Tutorials & Learning
YouTube returned 6 videos for “Typed Japanese”, and we withheld 6: 6 did not mention Typed Japanese. We are showing none, because we could not prove any of them are about Typed Japanese.
Official links
What are the best Typed Japanese alternatives?
The closest alternatives to Typed Japanese we list are Memrise, Preply and Loora. Ranked by direct product-type match, not category overlap.
| Alternative | Pricing | Starts at | Last verified |
|---|---|---|---|
| Memrise | Freemium | Pricing not published | — |
| Preply | Freemium | Pricing not published | — |
| Loora | Freemium | Pricing not published | — |
Alternatives to Typed Japanese
View all
Tools that pair well with Typed Japanese
Common stack mates teams adopt alongside Typed Japanese, with the specific reason each pairing earns its keep.
Memrise
Memrise teaches spoken language through native-speaker video, AI speaking practice and AI-graded exam prep for IELTS, GCSE, A-Level, IB and CEFR.
Preply
Book live 1-on-1 online tutoring with 100,000+ human tutors across 120+ subjects on Preply.
Loora
Loora is an AI English speaking partner that coaches pronunciation, grammar, and accent in live voice conversations on iOS and Android.
Typed Japanese vs its closest rival
Typed Japanese's closest head-to-head is with Praktika.
Our Typed Japanese vs Praktika verdict written Jul 8, 2026 is more than 90 days old, so it is being re-reviewed against current data and is not shown.
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