GrammarJLPT N5
→ object marker particle
Object Marker and Traversal Particle
JLPT N5ParticleNeutral
を is one of the most fundamental particles in Japanese. Its primary and most common function is to mark the direct object of a transitive verb — that is, the thing that receives the action. For example, in 'I eat rice,' the word 'rice' would be marked with を because it is the thing being eaten. Beyond this core role, を has two additional important uses: it marks the person made to do something in causative constructions (the 'causee'), and it indicates a space, path, or area that someone moves through or departs from, used with motion verbs like 歩く, 走る, 出る, and 飛ぶ. Learners often confuse を with が, which marks the subject, or with に and で, which mark locations differently. The key distinction is that を with motion verbs implies traversal through or departure from a space, whereas で marks where an action takes place and に marks a destination or static location. Although を is written with the kana 'wo,' it is pronounced 'o' in modern standard Japanese.
Functions
#1 Marking the direct object of a transitive verb
Structure
Noun + を + Transitive Verb
わたしは まいにち みずを のみます。
This is the most fundamental use of を. Here, みず (water) is the direct object — the thing being acted upon — and を connects it to the transitive verb のみます (drink). Without を, the listener would not know what grammatical role みず plays in the sentence. Virtually every transitive verb in Japanese uses を to mark its object in this way.I drink water every day.
Structures
- Direct object
- Noun + を + Transitive Verb
- Traversal / Departure
- Place Noun + を + Motion Verb
- Causative subject
- Person + を + Verb (Causative form)
Common mistakes
The most common mistake is confusing を with が. Remember that が marks the subject (the one doing the action) while を marks the object (the thing receiving the action). Another frequent error is using を with intransitive verbs that take に or が instead — for example, saying ×日本語を分かる instead of 日本語が分かる. Learners also sometimes use で where を is needed with motion verbs; こうえんで歩く means 'walk at the park' while こうえんを歩く means 'walk through the park,' and these are meaningfully different. Finally, in causative sentences, mixing up を and に changes the nuance: 子供を食べさせた (made the child eat) sounds more forceful than 子供に食べさせた (let the child eat), so choosing the wrong particle can unintentionally change your meaning.
Related
がはにでを〜させる (Causative)