The core idea: one character, many separate words
One evening in Japan can give you 生 four times, with four readings. A new acquaintance says he is a daigakusei, a university student, and where he was umareta, born. The first order at the izakaya is nama, draught beer, and at the end of the night he promises he will isshō, in his whole life, never forget it. The lines below come from that evening.
Stop thinking of 生 as one word. It is a label several words share. Japanese borrowed its Chinese sound twice, as shō and later as sei, then wrote native words with it whenever the meaning fitted: ikiru, to live; umareru, to be born; haeru, to grow; nama, raw; ki, pure. The map shows ten of the twelve official readings, each with a word to anchor it.
| Japanese | Romaji | Meaning |
|---|---|---|
| 大学生です。 | Daigakusei desu. | I'm a university student. |
| 東京で生まれました。 | Tōkyō de umaremashita. | I was born in Tokyo. |
| 今日のことは一生忘れません。 | Kyō no koto wa isshō wasuremasen. | I'll never forget today as long as I live. |
| とりあえず生で。 | Toriaezu nama de. | A draught beer to start with, please. |
Where the readings come from: Chinese waves and Japanese words
The on readings came from Chinese in waves. The oldest, go-on, arrived around the fifth and sixth centuries and survives in Buddhist and long-established words. Kan-on, modelled on the speech of the Tang capital in the seventh and eighth centuries, became the standard for learned vocabulary. A thin later layer, tō-on, came with Zen monks and traders from about the Kamakura period on. A character borrowed twice kept both readings.
The kun readings are Japanese words. When scribes began writing Japanese with Chinese characters, any native word whose meaning overlapped with a character could claim it. Ikiru, umu, haeru and nama share nothing in sound; they are different words about life and freshness.
| Word | Reading | Layer | Meaning |
|---|---|---|---|
| 行列 | gyōretsu | go-on, the oldest | a queue |
| 銀行 | ginkō | kan-on, the Tang standard | a bank |
| 行脚 | angya | tō-on, the later layer | a pilgrimage on foot |
| 一生 | isshō | go-on | a whole lifetime |
| 学生 | gakusei | kan-on | a student |
| 明朝体 | minchōtai | tō-on for the first kanji | the Mincho typeface, literally Ming-dynasty style |
You do not need these labels to read. They simply show that two on readings are not random: shō and sei, or ge and ka, are one Chinese syllable heard at different times and places, which is why they split between older and newer words.
Predicting the reading from the shape of the word
The basic rule, covered in depth in our guide to on and kun readings, looks at word shape. A kanji followed by hiragana is usually a kun word: 生きる is ikiru. Kanji joined to kanji usually take on readings: 学生 is gakusei. A kanji standing alone is usually a kun word: 生 by itself is nama. The flowchart adds each branch's typical exception.
A department store visit shows all three shapes.
| Japanese | Romaji | Meaning |
|---|---|---|
| エスカレーターで上に行きます。 | Esukarētā de ue ni ikimasu. | I'll go up on the escalator. |
| 屋上は立ち入り禁止です。 | Okujō wa tachiiri kinshi desu. | The roof is off limits. |
| 地下一階で降ります。 | Chika ikkai de orimasu. | I'm getting off at basement level one. |
| お手洗いは下の階です。 | Otearai wa shita no kai desu. | The toilets are on the floor below. |
| 値段が上がりました。 | Nedan ga agarimashita. | The prices have gone up. |
Beyond the basics: the kana choose among kun readings
The kana after a kanji do more than announce a kun reading. When a kanji has several kun words, the kana tell you which one. 上 is agaru in 上がる, ageru in 上げる and noboru in 上る. 下 is sagaru, sageru, kudaru, oriru or orosu, and the tail decides each time.
The system has one known gap. Te and ta forms can erase the difference: 行って is itte, from iku, to go, or okonatte, from okonau, to carry out. The sentence decides: meetings are carried out, shops are gone to. 開く has the same problem, aku or hiraku. The lines below come from a photo album, a bank queue, an old building and an office.
| Japanese | Romaji | Meaning |
|---|---|---|
| 赤ちゃんの歯が生えてきました。 | Akachan no ha ga haete kimashita. | The baby's teeth have started coming through. |
| 父はひげを生やしています。 | Chichi wa hige o hayashite imasu. | My father has a beard. |
| ATMでお金を下ろします。 | ATM de okane o oroshimasu. | I'll take some money out at the cash machine. |
| エレベーターがないので、階段で上ってください。 | Erebētā ga nai node, kaidan de nobotte kudasai. | There's no lift, so please go up by the stairs. |
| ただいま会議を行っています。 | Tadaima kaigi o okonatte imasu. | A meeting is in progress. |
| ちょっとコンビニに行ってきます。 | Chotto konbini ni itte kimasu. | I'm just popping out to the convenience store. |
| Word | Reading | Meaning |
|---|---|---|
| 生きる | ikiru | to live |
| 生まれる | umareru | to be born |
| 生える | haeru | to grow, of hair, teeth or plants |
| 上がる | agaru | to go up, to rise |
| 上げる | ageru | to raise; to give |
| 上る | noboru | to climb, to go up a slope or stairs |
| 下りる | oriru | to come down stairs or a mountain |
| 下ろす | orosu | to lower; to withdraw money |
Same spelling, different words: the pairs to watch
The same two characters can spell two different words, and only context separates them; shops often print namamono in hiragana to avoid the ambiguity. Picture these lines at a cake shop, a school reunion, a karaoke night, a removal booking and a quiet street.
| Japanese | Romaji | Meaning |
|---|---|---|
| 生物ですので、お早めにお召し上がりください。 | Namamono desu node, ohayame ni omeshiagari kudasai. | It's perishable, so please eat it soon. |
| 高校では生物が好きでした。 | Kōkō de wa seibutsu ga suki deshita. | At high school I liked biology. |
| 日本語がお上手ですね。 | Nihongo ga ojōzu desu ne. | Your Japanese is very good. |
| 歌は下手なんです。 | Uta wa heta nan desu. | I'm hopeless at singing. |
| 十月一日に引っ越します。 | Jūgatsu tsuitachi ni hikkoshimasu. | I'm moving on the first of October. |
| 夜は人気がないので気をつけて。 | Yoru wa hitoke ga nai node ki o tsukete. | There's nobody about at night, so be careful. |
| Spelling | Reading | Meaning | Where you meet it |
|---|---|---|---|
| 生物 | seibutsu | living things; biology | science, school subjects |
| 生物 | namamono | perishable food | cake shops, food labels |
| 上手 | jōzu | skilful | praise and compliments |
| 上手 | kamite | the right of the stage, seen from the audience | theatre |
| 下手 | heta | unskilful | modest remarks about yourself |
| 下手 | shimote | the left of the stage, seen from the audience | theatre |
| 一日 | tsuitachi | the first day of a month | dates and calendars |
| 一日 | ichinichi | one whole day | lengths of time |
| 人気 | ninki | popularity | rankings and menus |
| 人気 | hitoke | signs of people about | empty streets and buildings |
Which on reading? Older words and newer words
When a kanji has two on readings, the word decides, but there is a tendency. Go-on lives on in words that entered Japanese early, especially Buddhist ones; kan-on dominates learned and modern vocabulary. For 生, shō appears in isshō, a lifetime, and sesshō, the Buddhist sin of taking life. Sei covers gakusei, seikatsu, daily life, and sensei, literally 'born earlier'.
日 splits differently. Nichi is the everyday reading: nichiyōbi, Sunday, and mainichi, every day. Jitsu mostly sits second in calendar words: heijitsu, weekday, and honjitsu, today, on formal notices. 行 is kō in most words, such as ginkō, gyō in older and administrative ones, such as gyōretsu, and an in a handful, such as angya.
Listen for sound changes at the join, too: nichi shortens to nik in nikki, diary; shō becomes jō in tanjōbi, birthday; hi becomes bi in nichiyōbi. A bank notice and a birthday party use both kinds of on reading.
| Japanese | Romaji | Meaning |
|---|---|---|
| 本日は休業日です。 | Honjitsu wa kyūgyōbi desu. | We are closed today. |
| 平日は午後三時までです。 | Heijitsu wa gogo sanji made desu. | On weekdays we're open until 3 p.m. |
| お誕生日おめでとう。 | Otanjōbi omedetō. | Happy birthday. |
| 日本の生活に慣れましたか。 | Nihon no seikatsu ni naremashita ka. | Have you got used to life in Japan? |
Learning strategy: one anchor word per reading
A dictionary lists twelve readings for 生 as if they were equal. They are not: you meet sei and nama constantly, oitachi now and then. Learn readings as they arrive, attached to words, and give each one a short anchor you can say aloud.
- Learn the word first: you need gakusei and nama bīru anyway, and the shared kanji is a bonus.
- Keep one anchor per reading, ideally a word you use: seikatsu for sei, isshō for shō.
- When a new word appears, compare its shape with your anchors: compound, kanji with kana, or kanji alone.
- Leave rare readings and name readings until a real text brings them to you.
- Say the anchor sentence aloud when you review; a reading you have spoken is easier to recall.
Unihongo's free learning games for kanji and vocabulary suit the review step, because they test words rather than bare characters. Whole-word readings such as kyō, today, and ashita, tomorrow, are a different category, the irregular and ateji readings with their own guide; learn those as single words.
Common mistakes with many-reading kanji
Reading 生ビール as sei bīru. The cause is treating kanji plus katakana as a compound; the on rule is for kanji joined to kanji. The fix: nama bīru.
Reading 生じる as umajiru or ikijiru. The kana after the kanji suggested a kun word. But kanji-plus-jiru verbs are usually built on an on reading, with -jiru coming from suru: shōjiru, to arise, like kanjiru, to feel. The fix: treat the ending as a strong on signal, minding a few exceptions such as tojiru, to close.
Reading 一日 in a date as ichinichi. In a date it is tsuitachi, the first of the month, a whole-word reading; ichinichi is a day's length. The fix: learn the dates of the month as words, tsuitachi, futsuka, mikka and so on.
Reading every 行って as itte, the commoner word. The fix: when the object is an event or a survey, it is okonatte, as in chōsa o okonatte imasu, we are conducting a survey.
Memorising reading lists from a kanji dictionary. The list gives rare and common readings equal weight and no word to hang them on. The fix is the anchor method above.