English collapses distinct Japanese verbs into one word, so learners reach for whichever they learned first — and sound subtly off. The fix isn’t more vocabulary; it’s the boundary between near-synonyms. This guide draws that line for six high-frequency pairs: 見える vs 見られる (spontaneous vs able), 聞く vs 聞こえる (listen vs reach the ear), わかる vs 知る (understand vs know), なる vs する (become vs do/decide), かす vs かりる (lend vs borrow), and 行く vs 来る (viewpoint of motion) — each with real sentences, furigana, and full translations.
You can pass a vocabulary quiz on all of these words and still use them wrong in real sentences. The reason is structural: a bilingual dictionary gives you a label (“見える = to be visible”), but not the usage boundary that separates it from its neighbor. Native speakers don’t choose between these verbs consciously — they feel a different situation behind each one. This guide hands you those situations.
One idea unlocks half the list: Japanese distinguishes spontaneous perception (something reaches you on its own) from deliberate action (you direct your effort) far more sharply than English does. Keep that split in mind and 見える, 聞こえる, and わかる suddenly line up.
The Six Pairs at a Glance
| Pair | The line between them | Level |
|---|---|---|
| 見える / 見られる | Naturally visible vs able-to-see (opportunity) | N4 |
| 聞く / 聞こえる | Actively listen/ask vs sound reaches your ear | N4 |
| わかる / 知る | Understand/grasp vs come-to-know a fact | N5 |
| なる / する | Becomes on its own vs someone makes/decides it | N5 |
| かす / かりる | Lend (give out) vs borrow (take in) | N5 |
| 行く / 来る | Away from the speaker vs toward the speaker | N5 |
1. 見る vs 見える vs 見られる
Three verbs, one English word. The distinction is about who does the work — you, or the world.
見る is the active action: you point your eyes at something on purpose. It takes を because the thing is your object.
見える means the sight enters your eyes on its own — no effort, no choice. Fuji is simply there in view. It pairs with が because Fuji is the subject arriving, not an object you act on.
The line: 見える = it comes to your eyes whether you try or not. 見られる (the potential of 見る) = circumstances allow you to watch it — access, timing, permission. Fuji through a window is 見える; catching a limited screening is 見られる.
2. 聞く vs 聞こえる
The same spontaneous-vs-deliberate split, now for the ears.
聞く has two jobs: to listen (direct your attention to a sound) and to ask (道を聞く, ask for directions). Both are deliberate, so both take を or に.
The line: you weren’t trying to listen — the sound simply reached your ears. That’s 聞こえる, and like 見える it takes が. If you deliberately press your ear to the wall to catch it, that becomes 聞く.
3. わかる vs 知る
Both land on “know” in English, but they describe different mental events: grasping vs possessing a fact.
知る is the moment of acquiring a fact; the durable state “I know it” is 知っている. Crucially, its negative is 知らない (I don’t know it) — never 知っていない.
The line: 知っていますか asks “have you heard of it / do you have this info?” わかりますか asks “do you comprehend it?” You can 知っている a word (know it exists) yet not わかる how to use it. わかる takes が, because understanding dawns on you.
4. なる vs する
This pair encodes a worldview: does the change happen by itself, or does someone make it happen? Japanese leans hard toward なる — framing outcomes as natural results even when a person caused them.
なる = a state arrives on its own. Adjective + なる: 暖かくなる (become warm), 元気になる (get well). Noun + になる: 医者になる (become a doctor).
The line: 暖かくなる = it gets warm; 部屋を暖かくする = you warm the room. する also means “decide on” when ordering: コーヒーにします (I’ll have coffee).
5. かす vs かりる
Not a nuance problem — a direction problem. Both involve a loan, but they point opposite ways, and English “lend/borrow” confusion carries straight over.
Memory hook: 貸す (kasu) — the thing goes out. 借りる (kariru) — the thing comes in. When you ask a favor, you want 貸してください (please lend me) — asking someone to give out to you.
6. 行く vs 来る
English “come” and “go” track the listener; Japanese 行く / 来る track the speaker’s position. Motion toward where the speaker is = 来る; motion away = 行く — even when English would say the opposite.
The classic trap: Someone calls you to dinner and you reply. In English you say “I’m coming!” but in Japanese you are moving toward them, away from your current spot, so it’s 今行きます, not 今来ます. Anchor to the speaker’s location, not the listener’s.
Why These Pairs Blur — and the Fix
All six share one root cause: you learned each verb as a solo dictionary entry with an English gloss, so your brain filed 見える and 見られる under the same tag (“see”) and lost the boundary. The gloss is the problem. The fix is to learn the contrast, not the word:
- Study them in minimal pairs. Put 富士山が見える beside 映画が見られる. Memorizing the difference between two live sentences is what installs the boundary — a single word never can.
- Attach a situation, not a translation. “見える = it’s just there in view” beats “見える = to be visible.” A mnemonic that encodes the scene is what your memory retrieves in the moment.
- Review on a forgetting schedule. Nuance decays faster than raw meaning because it’s a finer distinction. Spaced repetition catches each contrast right before it fades, which is when re-exposure builds the strongest trace.
This is exactly how Kanjijo is built — every JLPT vocabulary word carries an exclusive mnemonic and example sentences, and the SRS engine schedules them so distinctions stick:
- Exclusive vocabulary mnemonics (8,000+ words)
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- SRS spaced repetition
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Frequently Asked Questions
見える means something is naturally visible — it enters your eyes without effort, like Mt. Fuji appearing from the window: 窓から富士山が見える. 見られる is the potential form of 見る and means you are able to see something because conditions allow it — access, timing, or permission: この映画は今なら見られる. Rule of thumb: 見える is spontaneous visibility (it comes to you); 見られる is enabled opportunity (you can get to it).
聞く is the active action of listening or asking — you direct your attention: 音楽を聞く (listen to music), 先生に聞く (ask the teacher). 聞こえる is the spontaneous verb for sound reaching your ears whether you tried or not: 隣の部屋から声が聞こえる. 聞こえる pairs with が, not を, because the sound is the subject arriving at you, not an object you act on.
知る means to acquire a piece of information — the moment of coming to know it. Its ongoing state is 知っている (I know it). わかる means to understand or grasp something — comprehension rather than mere possession of a fact. So 知っていますか asks whether you have heard of something, while わかりますか asks whether you understand it. A subtle trap: the negative of 知っている is 知らない, never the ungrammatical 知っていない.
Learn each verb inside a contrasting sentence pair rather than as an isolated dictionary word, so the boundary between them is what you memorize. Pair 富士山が見える with 映画が見られる, or 声が聞こえる with 音楽を聞く, and review both together with spaced repetition. Kanjijo attaches exclusive mnemonics and example sentences to every JLPT vocabulary word and schedules review with an SRS engine, so nuance pairs move into long-term memory as contrasts instead of blurring together.
Learn the nuance, not just the word
Kanjijo gives every JLPT vocabulary word an exclusive mnemonic and example sentences with furigana, then schedules review with an SRS engine so near-synonyms stick as contrasts. Add exclusive kanji mnemonics, an OCR scanner to decode real Japanese, home & lock screen widgets, a full N5–N1 grammar bank, and JLPT reading & listening practice — all in one calm, zen-designed app.
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