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The Japanese words worth keeping are the ones that already found you: the sign outside your station, the word your colleague uses constantly, the line of dialogue you almost understood. Keeping them takes seconds at the moment you meet them, and a review queue that decides when you see them again. It does not take a study session.

This is the opposite of how most people study Japanese, and it is the reason their vocabulary and their life stay in separate compartments.

The words that found you have already passed a test

A frequency list tells you which words are common in a corpus. Your own week tells you which words are common in your life, and those are not the same set. Nobody's textbook has 徐行 in the first thousand words, and yet if you cycle past that sign every morning, it is worth more to you than most of chapter four.

That said, a small deliberate baseline still earns its keep before the opportunistic words start arriving. The handful of verbs an ordinary day actually runs on — getting up, waiting, buying, eating — are common enough that you will meet them constantly regardless of what you happen to notice, so learning them on purpose, with the object each one takes, saves that first-week noticing for words a list could never have predicted.

Words you meet in the wild arrive with something no list can supply: a scene. You know where you were, who said it, what they were pointing at. That context is not sentimental — it is a second retrieval route to the same memory. When the word comes up again, the scene often arrives first and pulls the meaning with it.

So the filter is simple. Keep what you have met twice, or what blocked you from understanding something you cared about. Ignore the rest without guilt.

Capture has to happen in the street, not at your desk

Here is where the intention dies. You see 準備中 on a shutter at 8am. You will look it up later. By evening you remember that there was a word, on a shutter, somewhere, and that is all.

The gap between meeting a word and having it saved is the single highest-leverage thing to shorten in the whole process. Not your review technique, not your deck structure — that gap. If it costs two minutes, you will skip it under any real-world condition: it is raining, you are with someone, the train is coming.

What "capture" needs to preserve is the word and enough of the context to reconstruct it: a photo of the sign, a few seconds of the phrase spoken aloud, the sentence pasted from wherever you were reading. Anything less and you will be looking at a bare word later with no idea why you saved it.

A menu is the concentrated version of this problem — thirty unfamiliar items, a minute to decide, and staff waiting — which is why it is worth knowing what to lean on when you can't read most of it.

This is exactly what Kikusho is built around. Point the camera at the menu, say the phrase while it is still in your head, or paste the text — and a complete card comes back, which you review before it is saved. On one photo you can highlight up to five things and get five separate cards.

A Japanese card needs more than a word and a meaning

Japanese punishes minimal cards more than most languages, because a word carries information a two-sided card throws away.

A card you will still understand in three weeks holds:

  • The word, as it is actually written — 大丈夫, not だいじょうぶ, if that is how you met it.
  • The reading, because the characters do not tell you it. This is not optional in Japanese; it is the part you are actually learning.
  • The meaning, but narrowed to the sense you met. 適当 meaning "appropriate" and 適当 meaning "half-hearted" are the same word and opposite advice.
  • Register. Whether you can say this to a colleague, a friend, or nobody. Japanese encodes social distance in the verb itself, and a card without that produces confident mistakes.
  • An example sentence, ideally the one you met it in.

That is five fields, which is precisely why hand-made Japanese decks stall. Every field is another twenty seconds of lookup, so you cut the register note, then the example, and end up with cards that teach you a gloss instead of a word.

Learn the word, not the character

There is a stage — roughly the first two hundred characters — where studying kanji directly pays off, because you stop seeing noise and start seeing components: radicals, repeated shapes, phonetic hints.

After that, character-first study starts costing more than it returns. The reason is that Japanese readings only resolve inside words. 生 has a genuinely absurd number of readings, and no amount of staring at it in isolation will teach you which one applies. But 生ビール, 学生 and 生まれる each teach you exactly one, attached to a meaning, in a context you can picture.

So let the words carry the characters. A kanji you have met in four words is known in a way that a kanji you have drilled forty times in isolation is not — which is also why two look-alike characters stop competing once each one has a word of its own.

A routine that survives a bad week

The routine has two parts, and only one of them is scheduled.

In the moment, always: capture anything that stops you, in seconds. Photo, voice, or text. Do not look it up, do not decide whether it is worth it. Deciding is what makes you skip it.

Once a day, briefly: clear the review queue. Ten minutes, on the train, offline. Recall before you flip. The scheduler decides what appears; you do not.

That is the whole system, and it holds up on a week when you are busy, because the expensive part — choosing what to study — has been removed. What decides whether it works is not discipline. It is how memory decays and how timing counteracts it, and a capture step short enough that you never have to talk yourself into it.

Japanese rewards this more than most languages, because it is a language you can live inside from day one. The signs are already there. The menus are already there. The only question is whether the word survives the walk home.

Common questions

Should I learn kanji separately from vocabulary?

For the first two hundred characters, a little structured kanji study helps you see components instead of noise. After that, learning characters through the words that contain them is faster, because a reading only makes sense in a word.

What should I do when I cannot read a sign at all?

Photograph it. A photo preserves the context you will need later, and it lets you look the word up when you have time instead of standing in the street. Without the photo, you will not remember what you wanted to look up.

How many new Japanese words a day is realistic?

Five to ten words you actually encountered will outperform thirty from a list, because each one already has a scene attached to it. Volume is easy to increase and easy to abandon.