i+1 sentence mining Japanese is the difference between a deck you review and a deck you abandon. The idea is simple: choose sentences that are mostly understandable, with one new thing that stretches you.
The “i” is what you already know. The “+1” is the new word, grammar point, particle pattern, or expression that makes the sentence worth saving.
Quick definition
An i+1 sentence should feel like this:
- you understand the scene;
- you understand most of the sentence;
- one part makes you pause;
- an explanation makes that part clear;
- the sentence feels reviewable tomorrow.
For the broader method, read What Is Sentence Mining?.
Why hard sentences make bad cards
Hard sentences feel productive when you save them. They feel awful when you review them.
If a card contains five unknown words and two grammar patterns, your brain has no single target. You end up memorizing a translation instead of learning the Japanese.
Good Japanese Anki sentence cards are narrow. They preserve context while keeping the learning target clear.
How to spot an i+1 line
Listen for moments where you almost understood the line. Maybe the verb ending surprised you. Maybe one particle changed the meaning. Maybe a casual phrase sounded familiar but not automatic.
That is a good candidate. Click it, read the explanation, and ask: did one thing become clearer? If yes, save it.
This fits naturally with comprehensible input Japanese, because the best input is challenging but not chaotic.
Using KIKUGO for i+1 mining
KIKUGO helps because it explains the whole subtitle line in context. You do not have to guess whether the gap is vocabulary, grammar, or nuance.
Use it lightly. Save five strong i+1 lines from one episode instead of twenty random lines. A small deck of clean cards beats a giant deck of confusion.
Install KIKUGO, watch one scene, and mine only the lines that are one step above your level.
FAQ
What does i+1 mean in Japanese sentence mining? An i+1 sentence is a sentence you mostly understand, with one important new element. That new element might be a word, grammar pattern, particle use, or casual expression.
Why are i+1 sentences better for Anki? They are easier to review because most of the sentence is already familiar. Your attention goes to the one useful gap instead of fighting the whole line.
How do I find i+1 sentences on Netflix? Watch with Japanese subtitles, click lines that almost make sense, and save only the ones where the explanation makes one new point click.