Aru and Iru: Saying Something Exists in Japanese

The one question that chooses the verb

Before you say anything, ask whether the thing you are talking about can move itself. People and animals can, so they take imasu. Books, buildings, trees, money, meetings and questions cannot, so they take arimasu. Plants sit on the aru side even though they are alive, because the test Japanese applies is self-directed movement rather than biology. That single question resolves the great majority of sentences you will ever need, and it works the same way in the negative and the past.

Notice that the verb is chosen by the thing that exists, not by the place. A cat in a box and a cat on a roof both take imasu, and a box with a cat inside is still a box, so hako ga arimasu. Learners who instead try to translate the English there is or I have will pick the wrong verb about half the time, because English uses one word for both jobs.

The frame: place ni, thing ga

The default existence sentence is place plus ni, then the thing plus ga, then the verb. Ni pins the location as a point where something is, and ga introduces the thing as new information the listener did not have. Keep the order place first when you are answering what is there, because the question is about the contents of a known place. Eki no chikaku ni konbini ga arimasu answers what is near the station.

Do not swap ga for o here. Nothing is being acted on, so there is no object to mark. Do not use de for the place either: de marks the stage of an action, and existing is not an action. That contrast is worth practising in a set, because it is the single most common particle error in beginner speech: heya ni imasu for being in the room, heya de benkyō shimasu for studying in it.

Dare mo and nani mo always take a negative verb, so imasen and arimasen are compulsory in those two lines. Saying dare mo imasu is not a softer version of the sentence; it is simply ungrammatical.

When wa takes over the sentence

The frame flips when the thing is already known and the place is the news. Then the thing becomes the topic with wa and the place moves after it: ginkō wa eki no mae ni arimasu. Compare eki no mae ni ginkō ga arimasu, which answers what is in front of the station, with ginkō wa eki no mae ni arimasu, which answers where the bank is. Same facts, different question answered.

Questions follow the same logic. Doko ni arimasu ka asks for a location, so the thing you are asking about is the topic and takes wa. This is also why the answer to a where question sounds natural with wa and strange with ga. If you want the full account of that choice, the wa versus ga guide on this blog covers it; here you only need the reflex that a known thing takes wa and a new thing takes ga.

All the forms of aru and iru

Aru is a godan verb, so its stem work is regular apart from that one famous exception: the plain negative is nai, not aranai, and everything built on it follows, including nakatta and naide. Iru is an ichidan verb, so you drop ru and add the ending: imasu, inai, ita, ite. Teach yourself the polite row first, since that is what you will actually speak to strangers, and label the plain row clearly as the form you use with friends and inside longer sentences.

The past forms do a lot of work in ordinary talk. Kinō wa ie ni imashita reports where you were, and saifu ga arimasen deshita reports that your wallet was not there. Note that saifu ga arimasen, in the present, is how you say your wallet is missing right now, which English would express with a verb of having.

Position words that pair with aru and iru

Every one of these is a noun, which is why they take no in front and ni after: noun plus no plus position word plus ni. Aida is the only one that needs two anchors joined by to. Tonari means adjacent and usually implies the same category, so a shop next to a shop; if you only mean nearby, chikaku is safer. Yoko is a looser side-by-side alternative to tonari, and mukai means across from, as in eki no mukai ni.

Edge cases the animacy rule does not cover

None of these are traps that will stop a conversation; a listener who hears the wrong one still understands you. The pattern behind the wobbly rows is that Japanese speakers grant imasu to anything they are treating as an actor at that moment. That is also why a stuffed toy takes arimasu in a shop and can take imasu in a child's story. Follow the movement test, and let the exceptions come from imitation.

Aru and iru for having, and aru for events

Japanese usually says that something exists rather than that you own it. Jikan ga arimasu is how you say you have time, and tomodachi ga imasu is how you say you have friends, with the animacy split still deciding the verb. The owner, when mentioned at all, becomes the topic with wa: watashi wa kuruma ga arimasu. Beginners often reach for motte imasu instead, which is fine for objects you are physically carrying but sounds odd for time, siblings or a question.

You may occasionally meet kodomo ga arimasu for having children, which sounds old-fashioned or written to most speakers today. Use imasu for people and you will always be safe.

The last four lines show the third job of aru, which has no location in it at all. An event happens, and Japanese reports that with arimasu: a meeting, a test, a party, a typhoon. The time takes ni when it is a specific point on the calendar or clock, and takes nothing when it is a relative word such as ashita or raishū. Drill this one with your own diary rather than with textbook nouns.

Aru and iru are not desu

Desu identifies or describes: kore wa hon desu says this is a book. Arimasu locates: koko ni hon ga arimasu says there is a book here. Mixing them produces sentences such as hon wa arimasu desu, which no speaker says. Keep one predicate per clause, and let the meaning pick it: are you telling the listener what something is, or telling them that it is somewhere.

There is one convenient overlap. When the location itself is the answer, spoken Japanese often shortens ni arimasu to desu: toire wa nikai desu instead of toire wa nikai ni arimasu. Both are correct and the short one is more common at a counter or on the phone. Note that this works only for the location answer, never as a replacement for the full existence sentence.

Asking and answering at a counter

Two details make these sound native. First, wa often replaces ga in a question about whether something exists at all, because you are raising the item as a topic: yakkyoku wa arimasu ka. Second, the negative answer usually adds a place phrase with ni wa, as in kono hen ni wa arimasen, which softens it into around here rather than a flat no.

Mistakes that mark a beginner

• Using de for the place of existence: say kōen ni imasu, not kōen de imasu.
• Using o after the thing that exists: the correct particle is ga, since nothing is being acted on.
• Saying aranai for the plain negative: it is nai, and the past negative is nakatta.
• Using imasu for a plant or a car park because they feel present: the test is self-directed movement.
• Stacking desu after arimasu: arimasu is already the full predicate.
• Forgetting that dare mo and nani mo demand a negative verb.
• Reaching for motte imasu when talking about time, siblings or questions: use arimasu and imasu.

A three-minute description drill

• Minute one: name five objects around you with tsukue no ue ni, kaban no naka ni, mado no chikaku ni and so on.
• Minute two: add the people and animals, switching to imasu without slowing down.
• Minute three: negate half of them, so terebi wa arimasen and neko wa imasen, keeping the wa that contrast brings.
• Then ask yourself doko ni arimasu ka about each object and answer with the thing as the topic.
• Finish with three diary sentences using the event pattern: ashita, kaigi ga arimasu.
• Record the last run and check only two things: the particle before the verb, and whether you picked the right verb.