Transitive vs. Intransitive Japanese Verbs (自動詞・他動詞): The Ultimate Rulebook

Few concepts cause more persistent frustration for Japanese language learners than transitive verbs (他動詞 - tadōshi) and intransitive verbs (自動詞 - jidōshi). On the JLPT from N5 through N2, confusing whether a door "opens" on its own or whether someone "opened" it directly costs candidates valuable points in grammar, reading comprehension, and listening dialogues.

In Japanese, transitivity is not merely a vocabulary distinction; it reflects how native speakers view agency, responsibility, and the natural flow of states versus intentional human interventions. This guide provides the complete phonetic rules that allow you to deduce verb transitivity on sight, details the particle shifts between を (o) and が (ga), and catalogs the top 40 pairs tested on the JLPT.

Quick Summary: Transitive vs. Intransitive Rules

1. Particle Formula:
   • Transitive (他動詞): [Actor / Agent] は/が [Object] を [Verb] — Focuses on deliberate action on an object.
   • Intransitive (自動詞): [Subject] が [Verb] — Focuses on a natural state, event, or spontaneous change.
2. The -aru / -eru Rule: When a pair features -aru and -eru, the -aru form is almost always intransitive (上がる, 閉まる, 止まる) and the -eru form is transitive (上げる, 閉める, 止める).
3. The -su Rule: Verbs ending in -す (-su) are always transitive (消す, 落とす, 出す, 壊す), while their -ru counterparts are intransitive (消える, 落ちる, 出る, 壊れる).
4. State Construction:
   • 自動詞 + ている = An ongoing state that resulted from a past change (ドアが開いている — The door is currently open).
   • 他動詞 + てある = A state intentionally set and preserved by someone (ドアが開けてある — The door was deliberately left open for a reason).

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1. Fundamental Differences: Action vs. State

Consider the classic example of a door:

• Transitive (他動詞): 「田中さんがドアを開けました。」 Tanaka-san ga doa o akemashita. "Tanaka opened the door." (Deliberate human agency; requires direct object particle を).

• Intransitive (自動詞): 「風でドアが開きました。」 Kaze de doa ga akimashita. "The door opened in the wind." (Spontaneous natural occurrence; uses subject particle が).

In English, we often use the exact same verb for both ("I opened the door" vs. "The door opened"). In Japanese, these are two distinct lexical verbs with their own conjugations, kanji pronunciations, and syntactic environments.

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2. Phonological Pattern Rules to Predict Transitivity

Rather than memorizing hundreds of verb pairs blindly, you can utilize 5 reliable phonetic patterns:

Rule 1: -aru (Intransitive) vs. -eru (Transitive)

This is the most common pattern in modern Japanese:

Rule 2: -eru (Intransitive) vs. -u (Transitive)

Here, the pattern reverses: the -eru verb is intransitive, and the plain consonant stem -u is transitive:

Rule 3: -eru (Intransitive) vs. -su (Transitive)

Verbs ending in -su are virtually 100% transitive. They denote causing something to happen:

Rule 4: -iru (Intransitive) vs. -osu (Transitive)

Common for physical motion and displacement:

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3. High-Frequency JLPT Verb Pair Reference Table

Master these 15 essential pairs that appear continuously across N5–N3 mock and real exam papers:

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4. Crucial Grammar Combinations: ている vs. てある

Examiners frequently construct listening comprehension scenarios where distinguishing between 〜ている and 〜てある gives away the correct answer:

A. Intransitive Verb + ている: Resulting Natural State

Indicates that a physical change occurred in the past, and the resulting state remains present:

• 「窓が割れています。」 (The window is broken. — States an observation of reality without attributing blame).

B. Transitive Verb + てある: Purposeful Human Preparation

Indicates that an agent intentionally performed the action for a specific, ongoing purpose:

• 「部屋に暖房がつけてあります。」 (The heating has been turned on. — Intentionally pre-warmed for arriving guests).

Contrast Example from JLPT N3:

• 「電気がついています。」 → The light is on. (Neutral observation).
• 「電気がつけてあります。」 → The light was left on intentionally. (Someone purposefully left it on).

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5. Summary Checklist for Exam Day

When encountering an unfamiliar verb pair on the JLPT:

1. Check the preceding particle: を points to transitive; が points to intransitive.
2. Check the verb ending: does it end in -す? It is transitive.
3. Check the vowel shift: in -aru vs -eru, -aru is intransitive and -eru is transitive.
4. If testing 〜てある, the preceding verb must be transitive (他動詞). If 〜ている describes an inanimate object's static state, the verb is almost certainly intransitive (自動詞).

Practicing with targeted fill-in-the-blank questions and listening simulations will make these particle-verb associations second nature.