# Japanese Grammar Cheatsheet - Distilled

Japanese grammar looks vast from outside and small from inside. The trick is to find the small set of design choices that generate the rest, then derive everything from there.

Three properties do almost all the work: Japanese is [head-final](https://en.wikipedia.org/wiki/Head-directionality_parameter), [agglutinative](https://en.wikipedia.org/wiki/Agglutinative_language), and [topic-prominent](https://en.wikipedia.org/wiki/Topic-prominent_language). Every rule below is a consequence. Memorize the consequences and you will forget them. Internalize the three properties and you will reconstruct the consequences on demand.

---

## 1. Word order: SOV and head-final

English is SVO. Japanese is SOV. The deeper claim — [Joseph Greenberg's](https://en.wikipedia.org/wiki/Joseph_Greenberg) typological insight — is that SOV is one symptom of a more general parameter: Japanese is head-final. The head of every phrase comes last.

| Structure | English (head-initial) | Japanese (head-final) |
|-----------|----------------------|---------------------|
| Clause | I **eat** sushi | 私は寿司を **食べる** |
| Noun phrase | **big** dog | 大きい **犬** |
| Adposition | **in** Tokyo | 東京 **で** |
| Relative clause | the man **who** came | 来た **人** |
| Subordinate | **because** it rained | 雨が降った **から** |

One rule, five consequences. Particles come after nouns because the postposition is the head. Verbs end sentences because the verb is the head of the clause. Relative clauses precede their noun because the noun is the head of the noun phrase. Subordinate clauses precede main clauses because the main clause head sits rightmost. You don't memorize five rules. You memorize *head-final* and read the rest off.

![Syntax tree showing Japanese is head-final in both CP and TP, with the complementizer and tense-marking verb appearing rightmost in their phrases](https://upload.wikimedia.org/wikipedia/commons/2/2c/CP_TP_Head_Final_Japanese.png)
*Phrase-structure tree illustrating that Japanese is head-final in both CP (complementizer phrase) and TP (tense phrase) — heads sit on the right, exactly where English puts them on the left. Source: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:CP_TP_Head_Final_Japanese.png).*

> **Book**: Shibatani, M. (1990). *The Languages of Japan*. Cambridge University Press. Chapter 11 is the definitive typological analysis.

---

## 2. Particles (助詞): the skeleton of the sentence

English encodes role through position. *Dog bites man* and *man bites dog* mean opposite things because English nouns are flagged by where they sit. Japanese encodes role through [postpositional particles](https://en.wikipedia.org/wiki/Japanese_particles) — small grammatical clitics that follow each noun. The consequence: **word order is free**. Scramble the noun phrases however you like; the particles carry the meaning, the verb anchors the end.

### Core case particles

| Particle | Function | Example | Translation |
|:--------:|----------|---------|-------------|
| **は** (wa) | Topic marker | 猫 **は** 魚を食べる | (As for) the cat, it eats fish |
| **が** (ga) | Subject marker | 猫 **が** いる | There is a cat / A cat exists |
| **を** (wo) | Direct object | 水 **を** 飲む | Drink water |
| **に** (ni) | Target / location / time | 東京 **に** 行く | Go to Tokyo |
| **で** (de) | Means / location of action | 箸 **で** 食べる | Eat with chopsticks |
| **の** (no) | Possession / noun modification | 猫 **の** 名前 | The cat's name |
| **と** (to) | And / with / quotation | 犬 **と** 猫 | Dog and cat |
| **から** (kara) | From (space/time) | 東京 **から** 来た | Came from Tokyo |
| **まで** (made) | Until / as far as | 駅 **まで** 歩く | Walk as far as the station |
| **へ** (e) | Direction (toward) | 北 **へ** 行く | Go toward the north |
| **も** (mo) | Also / too | 猫 **も** 来た | The cat came too |
| **より** (yori) | Comparison (than) | 犬 **より** 大きい | Bigger than a dog |

### The は vs が distinction

The single most written-about page in Japanese linguistics. The short version: **は marks topic, が marks subject.** Topic is what the sentence is *about*. Subject is what *does the action* or *exists*. Old information rides on は; new information rides on が.

```
A: 誰が来た？         → Who came?         (が marks unknown/new info)
B: 田中さんが来た。   → Tanaka came.       (が introduces new info)

A: 田中さんは？       → What about Tanaka? (は marks known topic)
B: 田中さんはもう帰った。→ Tanaka already left. (は = "as for Tanaka...")
```

**The exhaustive-listing が**: 私 **が** 学生です = "*I* am the student (not someone else)." Contrast: 私 **は** 学生です = "As for me, I'm a student." Same words, different particle, different speech act.

![Syntactic tree of the Japanese SOV sentence "John-ga ringo-o tabe-ta" (John ate an apple), with the subject particle ga and object particle o marking case roles](https://upload.wikimedia.org/wikipedia/commons/f/ff/The_structure_of_%22John-ga_ringo-o_tabe-ta%22.png)
*Parse tree for ジョンがリンゴを食べた ("John ate an apple"). The particles -ga (subject) and -o (object) attach to their nouns; the verb sits at the bottom-right of the tree — case is carried by the particles, not by word order. Source: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:The_structure_of_%22John-ga_ringo-o_tabe-ta%22.png).*

> **Book**: Kuno, S. (1973). *The Structure of the Japanese Language*. MIT Press. Pages 37-71 are still the best treatment of は vs が after 50 years.

---

## 3. Verb conjugation: the agglutinative engine

Japanese verbs don't inflect for person or number. There is no *I run / he runs* split. Instead, suffixes glue to the stem to encode tense, negation, politeness, mood, causation, passivity, and desire — in roughly that order. One verb can carry six suffixes. This is the agglutinative engine. Turkish does the same thing; so does Finnish. English does it timidly (*walk-ed*, *walk-ing*) and stops.

### The three verb groups

| Group | Pattern | Dictionary form | ます-stem | Example |
|:-----:|---------|:--------------:|:---------:|---------|
| **I** (五段 godan) | Consonant stem | 書**く** (kaku) | 書**き** | Write |
| **II** (一段 ichidan) | Vowel stem | 食べ**る** (taberu) | 食べ | Eat |
| **III** (irregular) | Only two verbs | する / 来る | し / 来 (ki) | Do / Come |

Two regular patterns and two exceptions. That's the whole verbal morphology budget.

### Essential conjugation table (Group I: 書く)

| Form | Conjugation | Usage |
|------|-------------|-------|
| Dictionary | 書く | Plain present/future |
| ます (polite) | 書きます | Polite present/future |
| ない (negative) | 書かない | Plain negative |
| た (past) | 書いた | Plain past |
| て (connective) | 書いて | "and" / request / progressive |
| ば (conditional) | 書けば | If (one writes) |
| たら (conditional) | 書いたら | If/when (one wrote) |
| 可能 (potential) | 書ける | Can write |
| 受身 (passive) | 書かれる | Is written |
| 使役 (causative) | 書かせる | Make/let (someone) write |
| 意向 (volitional) | 書こう | Let's write / I'll write |
| 命令 (imperative) | 書け | Write! |

### The て-form: Swiss Army knife

The て-form is the most productive conjugation in the language. It is the universal joint — once a verb is in て-form, you can bolt almost any auxiliary onto it and get a new compound construction.

| Construction | Meaning | Example |
|-------------|---------|---------|
| ～ている | Progressive / state | 食べ **ている** = is eating |
| ～てある | Resultant state | 窓が開け **てある** = window has been opened |
| ～てしまう | Completion / regret | 食べ **てしまった** = ate it all (oops) |
| ～てみる | Try doing | 食べ **てみる** = try eating |
| ～てくれる | Someone does for me | 教え **てくれた** = taught me (grateful) |
| ～てあげる | I do for someone | 教え **てあげる** = I'll teach (for you) |
| ～てもらう | I receive the action | 教え **てもらった** = got someone to teach me |
| ～てもいい | Permission | 食べ **てもいい** = may eat |
| ～てはいけない | Prohibition | 食べ **てはいけない** = must not eat |

> **Book**: Makino, S. & Tsutsui, M. (1986). *A Dictionary of Basic Japanese Grammar*. The Japan Times. The gold standard. 「ている」alone gets eight pages.

---

## 4. Adjectives: two distinct systems

Japanese has two adjective classes with fundamentally different morphology. One class behaves like a stative verb. The other behaves like a noun that needs a copula. Knowing which is which determines how you negate, past-tense, and adverbialize.

| Property | い-adjectives (形容詞) | な-adjectives (形容動詞) |
|----------|:-------------------:|:--------------------:|
| Ending | ～い | ～な (before nouns) |
| Conjugates? | Yes (like verbs) | No (uses だ/です) |
| Negative | 高く**ない** | 静かで**はない** |
| Past | 高**かった** | 静か**だった** |
| Adverbial | 高**く** | 静か**に** |
| Example | 高い (takai) = expensive | 静か (shizuka) = quiet |

```
い-adjective:  高い本        → expensive book
              本は高い       → the book is expensive
              高くない       → not expensive
              高かった       → was expensive

な-adjective:  静かな夜      → quiet night
              夜は静かだ     → the night is quiet
              静かではない    → not quiet
              静かだった      → was quiet
```

**Trap**: いい (good) is irregular. Its conjugation reverts to the older form よい: よくない, よかった, よく. Worth memorizing once because *good* shows up in every conversation.

---

## 5. Politeness: the vertical axis

Japanese grammaticalizes social hierarchy. This isn't formal vs informal — it is a multi-layered system encoding your relationship to the listener *and* to the referent. The same verb has different roots depending on who is eating, who is being talked about, and who is being addressed.

### Three registers

| Register | Verb (eat) | When |
|----------|-----------|------|
| Plain (普通形) | 食べる | Friends, family, inner group |
| Polite (丁寧語) | 食べます | Default with strangers, colleagues |
| Humble/Honorific (敬語) | いただく / 召し上がる | Business, elders, customers |

### 敬語 (keigo): the three branches

| Type | Purpose | Example (eat) |
|------|---------|--------------|
| 尊敬語 (sonkeigo) | Elevate the other's actions | 召し上がる |
| 謙譲語 (kenjougo) | Lower your own actions | いただく |
| 丁寧語 (teineigo) | General politeness | 食べます |

```
Plain:     田中が食べた。           Tanaka ate.
Polite:    田中さんが食べました。     Tanaka ate. (polite)
Honorific: 田中様が召し上がりました。  Tanaka (honored) ate. (elevating)
Humble:    私がいただきました。       I (humbly) ate. (lowering self)
```

> **Book**: Wetzel, P.J. (2004). *Keigo in Modern Japan*. University of Hawaii Press. The sociolinguistic analysis, not just the grammar tables.

---

## 6. Sentence-final particles: emotional markup

At the end of a sentence, one short syllable does the work that English does with intonation, facial expression, and a thousand small modal verbs. These particles are **pragmatic**, not semantic — they don't change what the sentence *means*, they change the speaker's stance toward what was said.

| Particle | Function | Example |
|:--------:|----------|---------|
| **よ** | Assertion / informing | 危ないよ！ = It's dangerous! (I'm telling you) |
| **ね** | Seeking agreement | いい天気ですね = Nice weather, isn't it |
| **な** | Emotional / self-reflection | きれいだな = How beautiful... (to myself) |
| **か** | Question | 行くか？ = Going? |
| **の** | Explanation / seeking | どうしたの？ = What happened? (explain) |
| **わ** | Soft assertion | 行くわ = I'm going (gentle) |
| **ぞ** | Strong assertion (masc.) | 行くぞ！ = Let's go! (forceful) |
| **かな** | I wonder... | 大丈夫かな = I wonder if it's okay |
| **よね** | Confirmation seeking | 明日だよね？ = It's tomorrow, right? |

---

## 7. Counters (助数詞): the classifier system

You cannot say "three dogs" in Japanese without picking a [classifier](https://en.wikipedia.org/wiki/Japanese_counter_word). You say 三**匹**の犬 (san-**biki** no inu) — and 匹 is the classifier for small animals. Chinese does the same. Mai Tai cocktails do not. English speakers usually meet this through *a sheet of paper, a head of cattle, a loaf of bread* — Japanese generalizes that idea to everything countable.

### Essential counters

| Counter | For | 1 | 2 | 3 |
|:-------:|-----|:-:|:-:|:-:|
| つ | General | ひとつ | ふたつ | みっつ |
| 人 (にん) | People | ひとり | ふたり | さんにん |
| 匹 (ひき) | Small animals | いっぴき | にひき | さんびき |
| 本 (ほん) | Long/thin things | いっぽん | にほん | さんぼん |
| 枚 (まい) | Flat things | いちまい | にまい | さんまい |
| 台 (だい) | Machines/vehicles | いちだい | にだい | さんだい |
| 冊 (さつ) | Books | いっさつ | にさつ | さんさつ |
| 杯 (はい) | Cups/glasses | いっぱい | にはい | さんばい |
| 回 (かい) | Times/occasions | いっかい | にかい | さんかい |
| 階 (かい) | Floors | いっかい | にかい | さんかい |

The **sound changes** — いっ**ぽ**ん, さん**び**き, いっ**さ**つ — are [rendaku](https://en.wikipedia.org/wiki/Rendaku) and gemination, regular phonological processes that flatten the boundary between number and counter. They are predictable once you know the pattern, not arbitrary irregularities.

> **Paper**: Downing, P. (1996). *Numeral Classifier Systems: The Case of Japanese*. John Benjamins. The only full monograph on the system.

---

## 8. Giving and receiving: the directional triad

English uses one verb, *give*, and lets context fill in who benefits. Japanese refuses to be that vague. Three verbs split the conceptual space along social direction.

```
┌─────────────────────────────────────────────┐
│                                             │
│   INGROUP (me)  ←──── くれる ──── OUTGROUP  │
│                                             │
│   INGROUP (me)  ───── あげる ────→ OUTGROUP  │
│                                             │
│   INGROUP (me)  ←──── もらう ──── OUTGROUP  │
│        (I receive from)                     │
│                                             │
└─────────────────────────────────────────────┘
```

| Verb | Direction | Example |
|------|-----------|---------|
| あげる | I/we → others | 友達に本を **あげた** = I gave a book to my friend |
| くれる | Others → me/us | 友達が本を **くれた** = My friend gave me a book |
| もらう | I/we ← others (receive) | 友達に本を **もらった** = I received a book from my friend |

These compound with the て-form to express favor:

- 教えて **あげる** = I'll teach (for your benefit)
- 教えて **くれる** = (Someone) teaches me (grateful)
- 教えて **もらう** = I get (someone) to teach me

Pick the wrong verb and you have not just made a grammar mistake — you have miscoded the social relationship. *I gave myself a book* and *they did me the favor of giving a book* are different stories, and the verb has to know which one you're telling.

---

## 9. Passive, causative, and causative-passive

Japanese stacks these morphemes. You can passive a causative, causative a passive, and end up with verbs eight syllables long whose meaning unfolds suffix by suffix like a sentence in miniature.

| Form | Suffix | Example (read: 読む) | Meaning |
|------|--------|---------------------|---------|
| Active | -- | 読む | I read |
| Passive | -(r)areru | 読まれる | Is read / I suffer someone reading |
| Causative | -(s)aseru | 読ませる | Make/let someone read |
| Causative-passive | -(s)aserareru | 読まされる | Be made to read (against my will) |

**The suffering passive** (迷惑の受身) is the one that surprises English speakers. It marks the subject as adversely affected by someone else's action — a grammar slot for *getting screwed over*. No English construction maps onto it directly.

```
雨に降られた。
Rain-by fall-PASSIVE-PAST
"I got rained on." (and I suffered from it)

隣の人にタバコを吸われた。
Neighbor-by cigarette-ACC smoke-PASSIVE-PAST
"The person next to me smoked." (and I suffered from it)
```

> **Book**: Shibatani, M. (1985). "Passives and related constructions" in *Language* 61(4). The foundational analysis of the Japanese passive.

---

## 10. Conditionals: four ways to say "if"

Each conditional has a distinct semantic profile. They are not interchangeable. English collapses all four into *if* and lets you sort it out from context — Japanese forces you to pick the right one up front.

| Form | Nuance | Example |
|------|--------|---------|
| ～ば | General / hypothetical | 読め**ば**わかる = If you read it, you'll understand |
| ～たら | When/if (temporal, completed) | 読ん**だら**教えて = When you've read it, tell me |
| ～と | Automatic consequence | ボタンを押す**と**ドアが開く = Push the button and the door opens |
| ～なら | If (what you just said is true) | 行く**なら**傘を持って = If you're going, take an umbrella |

**Decision tree:**

```
Is the consequence automatic/habitual?
  YES → ～と  (押すとドアが開く)
  NO ↓
Are you responding to what someone said?
  YES → ～なら (行くなら...)
  NO ↓
Is the condition about a completed event?
  YES → ～たら (着いたら電話して)
  NO → ～ば   (安ければ買う)
```

> **Paper**: Masuoka, T. (1993). 「条件表現」in *日本語の条件表現*. Kurosio. The definitive typology of Japanese conditionals.

---

## 11. Relative clauses: no pronoun, just stack

Japanese relative clauses precede the noun and use **no relative pronoun**. The gap is implicit. There is no *that*, no *which*, no *who* — the clause just sits to the left of the noun and the listener fills in the slot.

```
English:  The book [that I bought yesterday]
Japanese: [昨日買った] 本
         [yesterday bought] book

English:  The person [who gave me this]
Japanese: [これをくれた] 人
         [this gave-me] person
```

Because there is no marker, you can stack relative clauses without any glue:

```
[去年東京で会った] [フランス語を話す] 人
[Last year Tokyo-in met] [French speaks] person
= The person who speaks French whom I met in Tokyo last year
```

Head-final again. Everything to the left modifies what comes next. Listening to long Japanese sentences feels like watching a compiler shift-reduce — pieces stack up on the left and resolve right.

---

## 12. Nominalizers: turning clauses into nouns

Two nominalizers turn entire clauses into noun phrases. They are not interchangeable; they split the conceptual space the way *of* and *that* do in English.

| Nominalizer | Usage | Example |
|:-----------:|-------|---------|
| **の** | Casual, concrete, sensory | 走る **の** が好き = I like running |
| **こと** | Formal, abstract, factual | 走る **こと** が大切だ = Running is important |

Rules of thumb:
- Perception verbs (見る, 聞く, 感じる) prefer **の**: 鳥が飛ぶ **の** を見た (saw birds flying)
- Abstract statements prefer **こと**: 日本語を話す **こと** ができる (can speak Japanese)

---

## 13. Conjunctions and clause-chaining

Japanese chains clauses by conjugating the *earlier* verb, not by inserting a conjunction. The て-form is the primary chaining mechanism; conjunctions, when used at all, sit clause-final.

| Method | Usage | Example |
|--------|-------|---------|
| て-form | Sequential / and | 起き**て**、食べ**て**、出かけた = Woke up, ate, and left |
| し | Listing reasons | 安い**し**、おいしい**し** = It's cheap, and it's tasty (among other things) |
| けど / が | But / although | 高い**けど**おいしい = It's expensive but tasty |
| ので | Because (objective) | 雨な**ので**行かない = Because it's raining, I won't go |
| から | Because (subjective) | 嫌い**だから**食べない = Because I dislike it, I won't eat it |
| のに | Despite / although | 勉強した**のに**落ちた = Despite studying, I failed |
| ながら | While (simultaneous) | 歩き**ながら**話す = Talk while walking |

---

## 14. Evidentiality and hearsay

Japanese grammaticalizes information source — how you know what you're asserting. English buries this in adverbs (*apparently*, *seemingly*, *supposedly*) and modal verbs. Japanese makes it a closed grammatical system: pick a suffix, declare your epistemic warrant.

| Form | Meaning | Example |
|------|---------|---------|
| ～そうだ (appearance) | Looks like | 雨が降り**そうだ** = It looks like it'll rain |
| ～そうだ (hearsay) | I heard that | 雨が降る**そうだ** = I heard it'll rain |
| ～ようだ | It seems (inference) | 雨が降った**ようだ** = It seems it rained |
| ～らしい | Apparently (evidence-based) | 雨が降る**らしい** = Apparently it'll rain |
| ～みたいだ | It's like / seems (casual) | 雨**みたいだ** = Seems like rain |
| ～だろう | Probably | 雨が降る**だろう** = It'll probably rain |

Watch the homonym: ～そうだ as appearance attaches to the verb **stem** (降り**そう**), while ～そうだ as hearsay attaches to the **dictionary form** (降る**そう**). Same syllables, different attachment site, different evidential channel.

---

## 15. Sentence structure summary

Putting it together, the Japanese sentence template is:

```
[Topic は] [Subject が] [Indirect Object に] [Direct Object を] [Adverb] [Verb-conjugation + auxiliaries] [Sentence-final particle]
```

Example:

```
田中さんは   昨日    友達に     本を     静かに    読んであげたらしいよ。

田中さんは → Topic: "As for Tanaka"
昨日      → Time: "yesterday"
友達に    → Indirect object: "to a friend"
本を      → Direct object: "a book"
静かに    → Adverb: "quietly"
読んで    → て-form of 読む: "read and..."
あげた    → giving (outward): "did for (the friend)"
らしい    → evidential: "apparently"
よ        → assertion particle: "I'm telling you"

= "Apparently Tanaka read a book to a friend quietly yesterday."
```

Seven pieces of grammatical information packed into one sentence-final verb complex. That is the agglutinative engine at work.

---

## The map

| # | Feature | Key insight |
|:-:|---------|------------|
| 1 | SOV word order | Head-final: everything modifies what follows |
| 2 | Particles | Replace word order; enable scrambling |
| 3 | Verb conjugation | Agglutinative suffixes, not person/number inflection |
| 4 | Two adjective types | い conjugates like verbs; な uses copula |
| 5 | Politeness | Grammaticalized social hierarchy, three registers |
| 6 | Sentence-final particles | Pragmatic (attitude), not semantic (meaning) |
| 7 | Counters | Obligatory classifiers with phonological changes |
| 8 | Giving/receiving | Three verbs encoding social direction of benefit |
| 9 | Passive/causative | Stackable; suffering passive is unique |
| 10 | Four conditionals | ば/たら/と/なら — distinct semantic profiles |
| 11 | Relative clauses | Prenominal, no relative pronoun, just gap |
| 12 | Nominalizers | の (concrete) vs こと (abstract) |
| 13 | Clause-chaining | て-form chains; conjunctions are clause-final |
| 14 | Evidentiality | Grammaticalized information source |
| 15 | Sentence template | Topic-Comment with verb-final agglutination |

---

If the kanji in these examples are unfamiliar, the [kanji dictionary](/kanjis) and the per-grade [study decks](/lessons) cover everything appearing above. For free online complements to the books listed below, [Tae Kim's Guide to Japanese](https://www.guidetojapanese.org/learn/grammar) and [Imabi](https://www.imabi.org/) are the two reference grammars worth bookmarking.

## Essential references

- Kuno, S. (1973). *The Structure of the Japanese Language*. MIT Press. -- The foundational generative analysis. は vs が treatment is still unmatched.
- Shibatani, M. (1990). *The Languages of Japan*. Cambridge University Press. -- Best typological overview. Treats Japanese as a language, not a curiosity.
- Makino, S. & Tsutsui, M. (1986, 1995, 2008). *A Dictionary of Basic / Intermediate / Advanced Japanese Grammar*. The Japan Times. -- The trilogy. Every serious learner owns these.
- Hasegawa, Y. (2015). *Japanese: A Linguistic Introduction*. Cambridge University Press. -- Modern, comprehensive, accessible.
- Martin, S.E. (1975). *A Reference Grammar of Japanese*. Yale University Press. -- 1,198 pages. The completionist's grammar.
- Tsujimura, N. (2013). *An Introduction to Japanese Linguistics*. Wiley-Blackwell. 3rd ed. -- Best textbook for linguistics students.
- Iwasaki, S. (2013). *Japanese: Revised Edition*. John Benjamins. -- Corpus-driven functional grammar. How Japanese actually works in use.