Japanese Verb Classes by Aspect: Stative, Continuous, Punctual, Fourth-Class (Kindaichi 1950)
Japanese verb classes by aspect are the stative, continuous, punctual, and fourth-class split proposed by Kindaichi Haruhiko in 1950. This lexical taxonomy decides what ている means for any given verb.1 The system answers the textbook contradiction every learner meets: 走っている translates as "is running" but 知っている translates as "knows", not "is knowing".23
This is the aspectual classification, which sorts verbs by the kind of situation they denote in time. It is distinct from the morphological classification (一段, 五段, irregular), which sorts verbs by how they conjugate. The two systems operate in parallel, and every Japanese verb carries one label from each.
Overview
Lexical aspect, sometimes called Aktionsart, is the property of a verb that determines the time-shape of the situation it describes: whether the verb names a state, an unfolding process, an instantaneous transition, or an inherent quality.45 Kindaichi 1950 was the first systematic Japanese-language treatment of this property. It remains the entry-point taxonomy taught in Japanese-language education (日本語教育) teacher training and serves as the descriptive backbone in academic surveys.167
Aspectual class vs. morphological class: two different verb taxonomies
The morphological taxonomy (一段, 五段, 不規則) classifies verbs by how they conjugate. It is form-based.8 The aspectual taxonomy (状態 / 継続 / 瞬間 / 第四種) classifies verbs by what kind of situation they denote in time. It is meaning-based.14
A single verb carries one label from each system at the same time. 走る is 五段 + 継続動詞, 知る is 五段 + 瞬間動詞, 結婚する is 不規則 (サ変) + 瞬間動詞, ある is 五段 + 状態動詞, and そびえる is 一段 + 第四種.19
For the morphological side, see Japanese Verb Groups: 一段, 五段, and Irregular.
Kindaichi 1950: the four-class proposal
The classification originates in Kindaichi Haruhiko's 1950 paper 国語動詞の一分類 ("A Classification of Japanese Verbs"), published in 言語研究 15.1 Kindaichi used ている-substitution as the operational diagnostic that defines the classes: a verb is sorted by whether it can take ている and, if so, what meaning ている produces.17
The four labels in Kindaichi's romanization are jōtai dōshi (statives), keizoku dōshi (continuatives / duratives), shunkan dōshi (instantaneous / punctual / momentaneous), and dai-yon-shu no dōshi (Type-IV / fourth-class).74 The work predates Kenny (1963), Vendler (1967), and Dowty (1979), but it is similar in spirit. All four frameworks classify verbs by the time properties of the situation a verb denotes.65
The four-class scaffold has been refined, not replaced. Kudo 1995 added subcategories and stricter tests for Japanese narrative tense-aspect.10 Shirai 2000 proposed an integrative semantics in which ている marks "the durative phase of a situation," subsuming the progressive and resultative readings under one prototype.7
JLPT placement and prerequisites
N5 and N4 textbooks introduce the ている construction. They also introduce several lexical items in their ている-only form (知っている, 住んでいる, 結婚している, 持っている), presented as memorized exceptions.2 N3 makes the aspectual contrast between progressive ている and resultative ている explicit and teaches it as a unified rule.
N2 reading passages introduce fourth-class (第四種) verbs such as そびえる, ありふれる, and 優れる in literary prose. The related continuative 〜つつある, which partners with Class 2, also lands at N2.1112
Prerequisite knowledge: morphological verb groups (一段, 五段, 不規則) and the literal formation of the ている construction. Both are N5 to N4 material.
The four classes and the ている diagnostic
Each class is defined by its behaviour with ている. The test is the same each time: try ている, then read the result.
Class 1: 状態動詞 (stative verbs): no ている at all
Stative verbs already denote a state. They express "ある状態にあること" (being in a state) rather than an action.9 They cannot take ている: the form *あっている is ungrammatical. The bare non-past form already conveys present state.113
Canonical members include ある, いる, できる, 要する, 値する, 見える, 聞こえる, 分かる, and 似合う.139
机の上に本がある。8
"There is a book on the desk."
富士山がよく見える。8
"Mt. Fuji is clearly visible."
この服はあなたに似合う。8
"These clothes suit you."
見える and 聞こえる describe perception rather than abstract being, but their non-past form already encodes the perceiver's current state, which puts them in Class 1 alongside ある and いる.13
Stative verbs also typically resist the imperative and 〜てください. An imperative does not apply to a verb that "merely expresses the way things are".13 Among the high-frequency members, できる is common in conversation; 値する and 要する are largely written-register.8
Class 2: 継続動詞 (continuous / durative verbs): ている = progressive
Continuous verbs denote "ある時間内続いて行われる種類の動作、作用" (actions or effects that unfold over a span of time).12 With ている, they yield a progressive reading, equivalent to English "is V-ing".14
Canonical members include 走る, 食べる, 読む, 書く, 泳ぐ, 笑う, 泣く, 歩く, 勉強する, 降る, 咲く, and 散る.912
子供が公園で走っている。3
"The child is running in the park."
雨が降っている。3
"It is raining."
彼は今、本を読んでいる。8
"He is reading a book right now."
This is the class English speakers often assume when reading any ている form. It is also the only class where the English present-continuous translation is reliable.4 Class 2 verbs cover the bulk of high-frequency action vocabulary, and ている here is unambiguous in isolation.
Class 3: 瞬間動詞 (punctual / instantaneous / achievement verbs): ている = resultative
Punctual verbs denote "瞬間に終わってしまう動作、作用" (actions or effects that begin and end at a single instant). They lexicalize a change of state.124 With ている, they yield a resultative reading. This means the event has happened and the resulting state holds at the reference time.147
Canonical members include 死ぬ, 着く, 知る, 結婚する, 始まる, 終わる, 落ちる, 消える, 卒業する, 失う, つく (as in 電気がつく), 届く, 決まる, and 見つかる.912
Knowing-class verbs work this way because Japanese 知る refers to a punctual point of entry into the state of knowing, an achievement. So 知っている is the post-event state, "knows".2 This class produces the classic textbook puzzles. 知っている means "knows" (not "is knowing"), 死んでいる means "is dead" (not "is dying"), and 落ちている means "lies on the ground" (not "is falling").34
田中さんは結婚している。2
"Mr. Tanaka is married."
その虫はもう死んでいる。3
"That insect is already dead."
私は彼の名前を知っている。2
"I know his name."
鈴木さんは東京に住んでいる。2
"Mr. Suzuki lives in Tokyo."
The negative resultative ("the state of knowing does not hold") uses the bare-form negative 知りません, not 知っていません. This is a fossilized pattern specific to 知る and a small cluster of Class-3 verbs. It follows from the punctual semantics: not having entered the state of knowing.2
知っている, 住んでいる, 結婚している, and 持っている are so strongly resultative that the bare forms feel marked outside specific constructions such as the inceptive 知った "I just found out".2
Class 4: 第四種の動詞 (fourth-class / lexicalized-state verbs): ている is obligatory
Fourth-class verbs "時間の観念を含まず、形容詞のようにその物事の様子、性質、形状、印象を表す。常に〜ている の形で用いられる" ("do not include a sense of time; like adjectives, they describe a thing's appearance, nature, shape, or impression; they are always used in the 〜ている form"). They carry no temporal reference, function like adjectives describing inherent qualities, and are used essentially only in the ている form.12
The test is the mirror image of Class 1: the bare non-past form is ungrammatical or vanishingly rare in normal predicate use, while ている is the default.113 Canonical members include そびえる, すぐれる, ずば抜ける, ありふれる, 似る, 澄む, and とがる.912
These verbs lexicalize a state with no separable underlying event. そびえている describes a mountain's tallness relative to others, not the action of towering up.13
富士山は東に高くそびえている。13
"Mt. Fuji towers tall to the east."
息子は父親によく似ている。12
"The son closely resembles his father."
彼の作品は他のものより優れている。13
"His work is superior to the others'."
そのアイデアはありふれている。12
"That idea is commonplace."
そびえる, ありふれる, and 優れる are written-register favourites in literary prose and JLPT N2 reading passages. They are rare in casual speech.12
The ている-substitution test, step by step
A four-step procedure derived from Kindaichi's tests sorts any new verb.14
- Can the verb take ている at all? If no, Class 1 (state). Example: *あっている is rejected, so ある is Class 1.
- Does ている mean "is V-ing"? If yes, Class 2 (continuous). Example: 走っている "is running".
- Does ている mean "has V-ed and the result holds"? If yes, Class 3 (punctual). Example: 知っている "knows" (= "has come to know").
- Is the bare non-past ungrammatical or vanishingly rare while ている is the default? If yes, Class 4 (fourth-class). Example: ?そびえる versus そびえている.
The four classes line up cleanly in a table of ている behaviour:
| Class | Japanese label | ている behaviour | English gloss of ている form | Canonical members |
|---|---|---|---|---|
| 1 Stative | 状態動詞 | rejects ている | not applicable | ある, いる, できる, 見える |
| 2 Continuous | 継続動詞 | ている = progressive | "is V-ing" | 走る, 食べる, 読む, 降る |
| 3 Punctual | 瞬間動詞 | ている = resultative | "has V-ed; state holds" | 知る, 死ぬ, 結婚する, 着く |
| 4 Fourth-class | 第四種の動詞 | ている is obligatory; bare is rare | "is X" (lexicalized state) | そびえる, 優れる, ありふれる |
Why English speakers default to the wrong class
The four-class system is not difficult once stated. But English-speaking learners often arrive with a one-shape expectation that maps cleanly onto only one of the four classes. Two predictable errors follow.
The "is V-ing equals progressive" assumption
English-speaking learners often read ている as a one-to-one translation of the English present continuous. This only works for Class 2.4 The common error is reading 知っている as "is knowing" and rejecting it as ungrammatical, when it denotes the resultative state "knows".23
A learner who wants to say "I know his name" but writes the bare form is reaching for a meaning the bare form does not have.
彼の名前を知っている。2
"I know his name."
知る is punctual; the bare form means "to come to know" at a single instant, not the ongoing state of knowing.
The achievement-verb mismatch
English die, arrive, and know are also achievement-class verbs in Vendler's taxonomy.56 What differs is the construction English uses to express the resulting state: "is dead" (copula plus adjective), "has arrived" (perfect), and "knows" (simple present of a stative).
Japanese expresses all three through ている.4 No additional auxiliary or construction is required. The Japanese system is simpler in that respect, but the simplicity is invisible until the learner stops projecting the English distinctions onto it.
When the same verb shifts class by context
The same verb can shift its ている reading in habitual or repeated contexts. 着る (put on, Class 3) yields 着ている "is wearing" (resultative); but iterative readings such as "(daily) puts on" appear with adverbs of frequency.4 飲む (Class 2) yields 飲んでいる "is drinking" (progressive); but with 毎日, the same form yields a habitual reading "drinks every day".4
Ogihara argues that these shifts follow from how ている marks "the durative phase of a situation," with context selecting which phase is at issue.47 The lexical class of the verb does not change; the contextual phase being foregrounded does.
How aspectual class interacts with other forms
Aspectual class predicts behaviour beyond ている. Several related constructions are sensitive to the same four-way split. A Class 3 verb that naturally takes 〜たばかり will refuse 〜つつある just as readily.
～たところ, ～たばかり, and ～つつある (event-edge expressions)
〜たところ and 〜たばかり attach naturally to punctual (Class 3) verbs to mark "just V-ed": 着いたところ "just arrived", 卒業したばかり "just graduated".14
〜つつある is a formal continuative that highlights an ongoing state of change. It combines with durative (Class 2) verbs and certain Class 3 change-of-state verbs such as 上がる and 増える. It is rare in everyday conversation.11
Stative (Class 1) and fourth-class (Class 4) verbs reject all three. There is no underlying punctual event or controllable process to stand "just after" or "in the middle of".
～てある (resultative, transitive only)
〜てある "almost exclusively attaches to transitive (他動詞) verbs". It describes a resulting state where someone intentionally did something and the result remains visible.8 The aspectual-class prediction is sharp: 〜てある requires a transitive verb (他動詞) from Class 3 (punctual change of state).8
Compare this with the intransitive partner's ている. 窓が開いている uses the intransitive 開く (Class 3, ている = resultative, agent-neutral). 窓が開けてある uses the transitive 開ける (Class 3, てある = resultative, with an implied agent).8
For a deeper treatment, see the dedicated article comparing 〜ている and 〜てある.
Volitional, imperative, and request forms
Stative (Class 1) and fourth-class (Class 4) verbs typically resist the volitional, the imperative, and the 〜てください request form. There is no controllable event for the speaker to will, command, or request.13
This is a useful negative test for class membership. A verb that resists 〜てください and ～(よ)う is almost always Class 1 or Class 4.
Good to know
Why "punctual" does not mean "fast"
In aspectual theory, punctual means "without internal duration", not "happens quickly". Japanese grammar treats the transition as a single boundary, regardless of clock time.45
死ぬ is punctual not because dying is quick (often it is not), but because Japanese lexicalizes the transition from alive to dead as a single point. Hence 死んでいる means "is dead" (the post-boundary state), not "is dying" (the run-up).4
住んでいる, 知っている, 持っている: the "permanent state" trio
All three are Class 3 verbs that surface almost exclusively in their ている form in conversation; the bare 住む, 知る, and 持つ feel marked.2 English speakers treat "live", "know", and "have" as ordinary statives requiring no special marking. So the obligatory ている feels like an idiom rather than a system. Under Kindaichi's classification, it is the system.4
Class 4 is small but stylistically marked
そびえる, ありふれる, 優れる, and ずば抜ける are written-register favourites in description and literary prose. Learners hit them more often in JLPT N2 reading passages than in conversation.12 The class is genuinely small (a few dozen items). Reference grammars treat it as a residual category.17
The dictionary will not tell you the aspectual class
JMdict and standard learner dictionaries label morphological class (v1, v5, vs), but not aspectual class.8 To recover the class, run the ている-substitution test. You can also consult a reference grammar that flags aspectual behaviour, such as the ている entry in A Dictionary of Basic Japanese Grammar.8
Kindaichi's classification has been refined, not replaced
Kudo (工藤 1995) added stricter tests and finer subcategories for Japanese narrative tense-aspect.10 Shirai 2000 proposed an integrative semantics that treats ている as marking "the durative phase of a situation." On this view, progressive and resultative readings derive from a single prototype.7 The four-class scaffold remains the entry-point taxonomy taught in Japanese-language education (日本語教育) teacher training and used as the descriptive backbone in academic surveys.67
Reading 知っている as "is knowing"
A common error is reading 知っている as a progressive ("is in the process of knowing") and producing or accepting matching English glosses. The correct reading is resultative.
田中さんはその人を知っている。2
"Tanaka knows that person."
知る is a Class-3 punctual verb. ている marks the resulting state of having entered into knowledge, not a process.24
Negating 知っている as 知っていません
The most common negation error is to negate ている directly. The correct negative uses the bare form.
田中さんはその人を知りません。2
"Tanaka does not know that person."
The negative resultative ("the state of knowing does not hold") uses the bare-form negative. This is a fossilized pattern specific to 知る and a small cluster of Class-3 verbs.2
第四種 in casual conversation sounds bookish
Saying 彼は優れている in casual chat sounds stiff and bookish. Spoken Japanese more often uses すごい, できる, or 上手 in the same slot.12 The Class-4 verbs are correct anywhere grammatically, but they mark elevated, written, or evaluative register.
A mnemonic for the four ています glosses
Class 1: the state already exists, so ている is redundant ("no"). Class 2: the action is in progress, so ている points to now. Class 3: the event is finished and the state lingers, so ている points to already-done. Class 4: the state is inherent in the verb, so ている is always on.
The four-way English gloss anchors the mnemonic: "is X / is X-ing / has X-ed / is X (inherent)".
"Punctual" from Latin punctum "point"
The term entered Japanese linguistics through translations of Vendler and Comrie. 瞬間 in Kindaichi's original Japanese term literally renders "blink-instant," matching the "point in time" sense of Latin punctum.51 Learners who mis-hear "punctual" as "happens quickly" should reanchor it to "no internal duration."
See also
- The ～ている Form in Japanese: Progressive vs. Resultant State
- Tense, Aspect, and Mood in Japanese: A Map
- Japanese Verb Groups: 一段, 五段, and Irregular
- ある vs. いる: The Two Japanese Existence Verbs
- Transitivity Pairs in Japanese (自他動詞): Intransitive vs. Transitive
- The Te-Form in Japanese: Construction Rules