納得 (nattoku) is the moment a thing truly makes sense and you’re convinced. Deeper than “I understood” — it’s “ah, now I get it.” Mizuru engineers that moment for every one of its 828 JLPT grammar points.
「分からない」→「納得した!」→定着
“I don’t get it” → “now it clicks!” → it sticks.
納
The problem we solve
“I studied the rule… so why do I freeze when I need it?”
ルールを覚えた。でも、使えない。
A rule alone rarely survives contact with a real conversation. You “learned” it, then forgot it — or you guessed right on a quiz and never truly understood. The gap is everything between learning a rule and 納得 — owning it. The Nattoku Method closes that gap, step by step.
得
The Nattoku loop · 納得ループ
Six stages, one seamless loop.
Every grammar point travels the same path through the Nattoku Method — from first sight to long-term memory. You saw stages of it in the lesson on the home page; here is the thinking behind each one.
1Understand理解
Meaning and native nuance in plain words — and every piece of jargon (“plain past”) is tappable for an instant explainer.
Why: comprehension must come before drilling — and nothing is left unexplained.
2See it real文脈
A real two-voice conversation plus examples with audio — tap any word to define it without leaving the lesson.
Why: comprehensible input in authentic context is how grammar is actually acquired.
3Distinguish区別
“Which one do I use?” — confusable forms side by side, with a clear rule for choosing between them.
Why: contrast resolves the #1 cause of grammar errors — a step textbooks often skip.
4Produceアウトプット
Recall it and speak it, scored — and every option is explained, even when you’re right.
Why: retrieval practice and output beat re-reading; explaining every choice ends lucky guessing.
5Consolidate復習
An auto-generated study guide of exactly what you missed — the whole point, distilled to your gaps.
Why: error-driven, personalised review targets your real weak spots — not everyone’s.
6Own it定着
Mastery climbs New → Learning → Great → Perfect through spaced review — and you can resume anytime.
Why: spaced repetition turns “I get it today” into “I’ll still know it next month.”
How we designed it
Built on established learning science.
We didn’t invent the science — we took the strongest evidence-based principles and engineered them into one seamless loop. That integration is the Nattoku Method.
Comprehensible input
Real, level-right context — not isolated rules.
Retrieval practice
You recall & produce it — the testing effect builds memory.
Spaced repetition (FSRS)
Reviewed right before you’d forget.
Error-driven review
Your mistakes become your study guide.
Just-in-time scaffolding
Tap-to-define and a jargon glossary, exactly when needed.
Metacognition
Mastery states show where you really stand.
What that gives you
Five promises, kept in every lesson.
No jargon left unexplained
Tap any term for a plain-language definition.
No lucky guessing
We explain why the other answers are wrong — even when you’re right.
Usage, not just rules
“Which one do I actually use?” — answered, side by side.
You produce it
Recall and speak — not just recognise.
Built from your mistakes
A personalised study guide, then spaced review until Perfect.
納得した!
That moment — for all 828 grammar points, N5 to N1. With the Nattoku Method, Mizuru makes grammar click, then makes it stick.
Mizuru 沐學