Japanese frequently writes one spoken word with several different kanji, each narrowing the meaning. 聞く is hearing in general, 聴く is listening on purpose. 会う is meeting a person, 合う is fitting together, 遭う is running into something unpleasant. The technical name is 異字同訓. The rule that saves you: the more specific kanji makes a claim, so if you are not sure the claim is true, use the general kanji or write the word in kana.
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There is a specific moment, usually somewhere around N3, when a dictionary stops helping you and starts making things worse. You look up "to measure" and it hands you five kanji. You look up "to see" and it hands you four. Nothing marks which one is normal, nothing explains when the others apply, and the example sentences all look equally plausible.
This is not the dictionary being unhelpful. It is Japanese telling you something you have not been told yet: the kanji is not a spelling of the word. It is a claim about which sense of the word you mean. Once that lands, this whole area stops being a memorisation nightmare and becomes one of the most satisfying parts of the language.
Why one word ends up with five kanji
That history has a practical consequence worth stating plainly. When a Japanese writer chooses 診る over 見る, they are adding information that the spoken sentence does not carry. A reader who only knows 見る does not merely miss a character. They miss the fact that a doctor is involved. This is why the distinctions matter far more for reading than for writing.
The 12 sets that actually come up
Each set below gives the rule, a sentence with furigana and a full translation, and a safe default for when you genuinely cannot decide.
Meeting a person. This is the everyday one.
明日駅で友達に会います。あしたえきでともだちにあいます。I am meeting a friend at the station tomorrow.
Two things matching or fitting: sizes, tastes, opinions, answers.
この靴はサイズが合いません。このくつはサイズがあいません。These shoes are not the right size.
Running into something unwelcome: an accident, a storm, a crime. Never used for people you are pleased to see.
帰り道で事故に遭いました。かえりみちでじこにあいました。I was in an accident on the way home.
Sound reaching you, and also asking someone something. Covers most situations.
道を聞いてもいいですか。みちをきいてもいいですか。May I ask you for directions?
Listening attentively and deliberately. Standard for music, concerts, and careful listening in interviews or counselling.
毎朝電車で音楽を聴いています。まいあさでんしゃでおんがくをきいています。I listen to music on the train every morning.
Specifically asking a question. Outside the jōyō list, so newspapers and textbooks write 聞く instead. Worth recognising in novels.
理由を訊いてみた。りゆうをきいてみた。I tried asking why.
Seeing, looking, glancing. The default for almost everything.
窓から海が見えます。まどからうみがみえます。You can see the sea from the window.
Watching something staged to be watched: a film, a play, a match. Sitting down for it is the point.
週末に映画を観に行きます。しゅうまつにえいがをみにいきます。I am going to see a film at the weekend.
A doctor examining a patient. One character tells you the whole context.
先生に診てもらったほうがいいですよ。せんせいにみてもらったほうがいいですよ。You had better get a doctor to look at that.
Looking after someone who is ill. Same character as 看護, nursing.
母を看ながら働いています。ははをみながらはたらいています。I am working while caring for my mother.
Dimensions: length, distance, depth, speed. The water radical 氵 hints at depth and flow.
部屋の広さを測ってください。へやのひろさをはかってください。Please measure the size of the room.
Time and counting. Contains 言, the calculating radical, and lives in 時計 and 計算.
ストップウォッチで時間を計ります。ストップウォッチでじかんをはかります。I time it with a stopwatch.
Weight and volume. Same character as 重量, weight.
毎朝体重を量っています。まいあさたいじゅうをはかっています。I weigh myself every morning.
Not measuring at all. Planning or attempting something, as in a diagram or scheme.
問題の解決を図る。もんだいのかいけつをはかる。To work toward solving the problem.
Formally consulting a body: a committee, a council, a board. Almost exclusively written and official.
この件は委員会に諮ります。このけんはいいんかいにはかります。This matter will be referred to the committee.
Repairing an object, or correcting a mistake. Also "do it again" as a suffix: 書き直す.
自転車を直してもらいました。じてんしゃをなおしてもらいました。I had my bicycle repaired.
Curing an illness or injury. Same character as 治療, treatment.
風邪を早く治したいです。かぜをはやくなおしたいです。I want to get over this cold quickly.
Making something small or everyday: food, documents, plans, songs.
今夜はカレーを作ります。こんやはカレーをつくります。I am making curry tonight.
Building something large or industrial: ships, buildings, bridges, and by tradition sake and miso.
この町では昔から酒を造っています。このまちではむかしからさけをつくっています。This town has brewed sake since long ago.
Creating something that did not exist before. Same character as 創造 and 創立.
新しい文化を創る。あたらしいぶんかをつくる。To create a new culture.
Physically hard rather than soft. The stone radical 石 gives it away. Also used of stiff, inflexible writing.
このパンは硬すぎます。このパンはかたすぎます。This bread is too hard.
Firm, solid, tightly fixed rather than loose. Also used of resolve and of promises.
彼の決意は固かった。かれのけついはかたかった。His resolve was firm.
Sturdy and reliable, used of people, jobs and businesses. 堅い人 is a serious, dependable person.
彼女は堅い仕事についている。かのじょはかたいしごとについている。She has a steady, respectable job.
Hot weather or air. Contains 日, the sun.
今年の夏は本当に暑いですね。ことしのなつはほんとうにあついですね。This summer really is hot, isn't it.
A hot object or liquid, and by extension passionate feeling. Contains 灬, fire.
熱いお茶をいただけますか。あついおちゃをいただけますか。Could I have a hot cup of tea?
Not hot at all. Thick, of books, coats and slices, and figuratively of hospitality.
厚い本を一冊買いました。あついほんをいっさつかいました。I bought one thick book.
Taking, picking up, obtaining. The broad default.
そこの塩を取ってください。そこのしおをとってください。Please pass me the salt.
Taking a photograph or filming. Unavoidable in daily life.
写真を撮ってもいいですか。しゃしんをとってもいいですか。Is it all right if I take a photo?
Adopting, collecting or hiring: a policy, a blood sample, a new employee. Same character as 採用.
血を採って検査します。ちをとってけんさします。We will take a blood sample and run tests.
Catching something that could get away: fish, insects, a suspect.
川で魚を捕りました。かわでさかなをとりました。I caught fish in the river.
Changing what something is like: a plan, a colour, an attitude. The thing stays, its nature changes.
予定を変えてもいいですか。よていをかえてもいいですか。Would it be all right to change the plan?
Exchanging one thing for another, often across a boundary: money, batteries, air. Same as 交換.
円をドルに換えたいのですが。えんをドルにかえたいのですが。I would like to change yen into dollars.
Swapping in another of the same kind. Lives inside 着替える and 両替.
服を着替えてから出かけます。ふくをきがえてからでかけます。I will change clothes and then go out.
Having something stand in for something else, often a role or a person.
メールをもって挨拶に代えさせていただきます。メールをもってあいさつにかえさせていただきます。Please allow this email to stand in for a proper greeting.
Taking in or storing away, and idiomatically achieving a result.
大きな成功を収めました。おおきなせいこうをおさめました。They achieved a great success.
Mastering a discipline through study. Same as 修士, a master's degree.
大学で法律を修めた。だいがくでほうりつをおさめた。He studied law at university.
Governing or bringing under control. The same character as curing an illness, and the logic is the same: restoring order.
国を治めるのは簡単ではない。くにをおさめるのはかんたんではない。Governing a country is not simple.
Paying or delivering what is owed. Same as 納税, paying tax.
期限までに税金を納めてください。きげんまでにぜいきんをおさめてください。Please pay your taxes by the deadline.
Going up in general, including figuratively.
階段を上って二階へ行きます。かいだんをのぼってにかいへいきます。Go up the stairs to the second floor.
Climbing something that takes effort: a mountain, a tree, a ladder.
去年富士山に登りました。きょねんふじさんにのぼりました。I climbed Mount Fuji last year.
Rising smoothly without effort: the sun, smoke, a promotion. Contains 日.
朝日が海から昇ってきた。あさひがうみからのぼってきた。The morning sun rose out of the sea.
Not sure which JLPT level this material belongs to for you? The free level test runs 25 questions across N5 to N1 and shows exactly where your accuracy drops.
Take the free JLPT level testFour principles that cover the sets you have not met yet
1. The specific kanji makes a claim
Writing 遭う says the encounter was unwelcome. Writing 診る says a medical professional is looking. If you are not certain the claim is true, the general kanji is not a compromise, it is the correct answer.
2. Learn the kanji's field, not the pairing
Do not memorise "はかる has five kanji." Learn that 測 belongs to physical dimensions, 量 to quantity, 諮 to formal consultation. The choice then falls out of what you already know, and it generalises to compounds you have never seen.
3. The compound is the giveaway
Almost every one of these characters appears in a common two kanji word that spells out its meaning: 採用 for 採, 交換 for 換, 治療 for 治, 看護 for 看. If you can recall the compound, you can derive the verb.
4. Kana is a legitimate answer
Native writers use kana constantly for exactly this reason, and official style guides mandate it for readings outside the jōyō list. Kana is neutral. A wrong kanji is not.
Why this matters more for reading than for writing
Here is the reframe that makes the whole topic feel worth the effort. You will rarely be forced to choose one of these kanji yourself, because you can write kana, and because input software offers the options with descriptions attached. What you cannot avoid is reading them.
Compare two sentences that sound completely identical when spoken:
母を見ています。ははをみています。I am looking at my mother.
母を看ています。ははをみています。I am caring for my mother.
Same sound, same kana, entirely different life. In speech, context and intonation resolve it. In writing, the kanji is doing the work by itself, and a reader who treats 看 as an unfamiliar variant of 見 has just misunderstood the sentence without noticing. This is exactly the kind of loss the JLPT reading section is built to detect, and it is why these distinctions climb steadily in weight from N3 through N1.
How to actually learn them
Flat lists fail here, and they fail for a specific reason: the twelve sets above contain around forty characters whose only shared feature is a sound. There is nothing for memory to grip. What works is meeting each character inside a sentence where the choice is doing visible work, and meeting it again before it fades.
That is the shape of Kanjijo. Every kanji and every vocabulary item carries an exclusive mnemonic written to be remembered rather than translated, and every example sentence carries furigana over the kanji and a full English translation underneath, so you see why that character was chosen rather than being told to memorise a pairing. The SRS engine then schedules each item for the day you are about to lose it, which matters more here than almost anywhere else, because near-identical items decay by blurring into each other rather than by disappearing.
Between sessions the material keeps working. The home screen and lock screen widgets put today's items where your eyes already go, and the test widget quizzes you straight from the home screen. When you hit one of these characters in the wild, on a hospital sign, a menu or a form, the OCR scanner reads it off the image and turns it into a study item on the spot.
And because reading is where these distinctions actually bite, the JLPT reading track puts them back in front of you inside full passages, with listening sets, full mock exams, and conversation, shadowing and dictation covering the half of the language a kanji chart cannot reach.
Quick reference
- あう
- 会う person · 合う fits · 遭う something bad
- きく
- 聞く general · 聴く on purpose · 訊く ask (rare)
- みる
- 見る general · 観る a show · 診る medical · 看る caring
- はかる
- 測る length · 計る time · 量る weight · 図る plan · 諮る consult
- なおす
- 直す objects · 治す illness
- つくる
- 作る everyday · 造る large scale · 創る original
- かたい
- 硬い vs soft · 固い vs loose · 堅い dependable
- あつい
- 暑い weather · 熱い objects · 厚い thick
- とる
- 取る general · 撮る photos · 採る select · 捕る catch
- かえる
- 変える nature · 換える exchange · 替える substitute · 代える stand in
- おさめる
- 収める obtain · 修める master · 治める govern · 納める pay
- のぼる
- 上る general · 登る with effort · 昇る rise
Go deeper
- Meaning first, reading second, and why the order matters
- On'yomi and kun'yomi: which reading is running and when
- Ippon, nihon, sanbon: the sound change rules nobody explains
- Kanji that look alike and how to stop confusing them
- Furigana: the tiny kana that let you read kanji you have not learned
- Free JLPT level test: find your real level in 25 questions
- Japanese Homophones: How Native Speakers Tell 科学 from 化学 Out Loud
Learn the character's meaning, not the pairing
Kanjijo gives you the full kanji, vocabulary and grammar bank for every JLPT level, mnemonics for every kanji and every word, furigana and English on every example sentence, an SRS engine, lock screen and home screen widgets, a test widget, JLPT reading and listening practice, mock exams, conversation, shadowing, dictation and a camera scanner.
Download Kanjijo FreeFrequently Asked Questions
Because the Japanese words existed before the characters did. When Chinese writing arrived, a single Japanese word such as はかる was mapped onto several different Chinese characters, each covering a narrower slice of its meaning. The spoken word never split, so one sound now has several written forms. The term for this is 異字同訓.
聞く is general: sound reaching you, and also asking someone something. 聴く is deliberate, attentive listening, which is why it is standard for music and concerts. 音楽を聴く is the normal choice; 音楽を聞く is not wrong but suggests the music simply happened to be audible.
測る for length, distance and depth; 計る for time and counting; 量る for weight and volume; 図る for planning or attempting; 諮る for formally consulting a committee. Each character carries its own field, so learning the field rather than the pairing makes the choice automatic.
No, and native writers do it constantly. Official style guides even require kana for readings outside the jōyō list, which is why 訊く usually appears as 聞く or きく. Kana is neutral, while the wrong kanji makes a specific claim that may be false.
Yes, from N3 upward and heavily at N2 and N1. The vocabulary section asks which kanji fits a context, and reading passages lean on the distinction to carry meaning, so a reader who flattens 看る into 見る loses information rather than just a character.
あう, きく, みる, なおす and とる, because all five appear constantly in everyday Japanese and each has a clean rule. Leave はかる, おさめる and かえる until N2 or later, since they are largely written vocabulary and are easier to absorb from reading than from a list.