Arimasu vs Imasu: How Japanese Says There Is

English has one phrase for existence: there is, there are. A book, a dog, a problem, a person — same construction, no decisions to make. Japanese makes you decide every single time, and the decision is not optional.

あります (arimasu) is for things that do not move on their own. います (imasu) is for things that do. That is the whole rule. A book is あります. A dog is います. A person is います. A tree is あります, even though it is alive.

The plain forms are ある (aru) and いる (iru); あります and います are the polite forms, and they are what you should use until you are comfortable with plain style.

The split, stated properly

The rule is usually taught as "living versus non-living", but that phrasing trips people up the moment they meet a plant. The real distinction is whether the thing can move under its own power.

Trees, flowers and grass take あります, because a tree cannot walk. A goldfish takes います even though it certainly cannot walk anywhere you would notice — the line is drawn at "animal", not at "mobile". Robots and dolls are genuinely ambiguous; some speakers use います for a robot that behaves like a person. For a test or an exam, go by whether the referent is a living creature.

Dead pets are another soft edge. いました (imashita, "there was") is the warmer choice when talking about an animal that has died, and many speakers use it; ありました is the neutral, more clinical option. Both appear, so do not agonise.

The beginner's shortcut: does it breathe and move by itself? います. Otherwise, あります.

The sentence pattern: place に, thing が

Existence sentences have a fixed shape, and getting it right is most of the battle:

place + に + thing + が + あります / います

• 部屋に机があります (heya ni tsukue ga arimasu, "there is a desk in the room")
• 公園に子供がいます (kouen ni kodomo ga imasu, "there are children in the park")
• 冷蔵庫にビールがあります (reizouko ni biiru ga arimasu, "there is beer in the fridge")
• ここに人がいます (koko ni hito ga imasu, "there is a person here")

The place always comes first, it is always marked with に, and the thing that exists is always marked with が. English word order ("there is a book on the desk") puts the place last, so translating word for word produces the scrambled 本があります机の上に — which a Japanese speaker will parse as nonsense.

に marks where something exists; で marks where an action happens. If you are describing the location of a thing, it is に. If you are describing the location of an activity — 公園で遊ぶ (kouen de asobu, "play in the park") — it is で. Same park, different particle, because existing and playing are different kinds of event. The ni-versus-de article works through that boundary in detail.

が marks the thing that exists, and it is not interchangeable with は here. 本があります presents the book as new information: something is on the desk, and it is a book. 本はあります means "as for the book, it exists" — which is a valid sentence, but only when the book is already the topic of conversation, usually in answer to a question or in contrast to something else. In a plain existence statement, it is が. Using を is simply wrong: 本をあります does not exist as a sentence.

Existence is also how Japanese says "have"

This is the part that surprises English speakers most. Japanese has no verb meaning "to have" in the everyday sense. Owning something is expressed as that thing existing in your possession, which means you use the same two verbs:

• 車があります (kuruma ga arimasu, "I have a car") — literally "a car exists"
• 子供が二人います (kodomo ga futari imasu, "I have two children")
• 時間がありません (jikan ga arimasen, "I don't have time")
• ペットを飼っています (petto wo katte imasu, "I have a pet") — this one uses 飼う (kau, "keep an animal") because pets get their own verb

The に in these sentences is often dropped, because the possessor is obvious from context. When you do state it, the possessor takes に or には: 私には兄がいます (watashi ni wa ani ga imasu, "I have an older brother").

Be careful with 持つ (motsu, "to hold, to carry"). It exists, and it is used for physically holding something or for carrying it with you — お金を持っています (okane wo motte imasu, "I have money on me"). It is not the general verb of ownership, and it is not the verb you want for "I have a sister".

The same logic covers events. "I have an exam tomorrow" is 明日、試験があります (ashita, shiken ga arimasu) — literally "there is an exam tomorrow". English frames it as possession; Japanese frames it as existence in time.

Questions and negatives

Both verbs behave like ordinary polite verbs.

• トイレはどこにありますか (toire wa doko ni arimasu ka, "where is the toilet?")
• 猫はいますか (neko wa imasu ka, "is there a cat?" / "do you have a cat?")
• 昨日、公園に人はいませんでした (kinou, kouen ni hito wa imasen deshita, "there was nobody in the park yesterday")

Note how natural は sounds in that last example: once you are negating or asking about a specific thing, は becomes the normal choice, because the thing is now the topic rather than news. Existence sentences switch between が and は more freely than most, and the toggle is exactly the familiar one — new information takes が, already-known topics take は.

There is a second, unrelated use of あります you will meet early: 〜てあります (te arimasu), which describes a state left behind by a deliberate action — 窓が開けてあります (mado ga akete arimasu, "the window has been left open"). It looks like existence but it is really the て-form plus a helper, and the te-iru article covers that family of patterns.

Common mistakes for English speakers

• Using あります for people. 教室に先生があります is wrong; it is 先生がいます (sensei ga imasu, "there is a teacher"). This is the single most common error with these verbs, and it comes straight from English, which has no reason to distinguish.
• Using います for objects. 公園に石がいます is wrong; 石があります (ishi ga arimasu, "there is a stone"). If it cannot move, it cannot take います.
• Getting the word order from English. "There is a book on the desk" tempts you into 本があります机の上に. Put the place first, always: 机の上に本があります.
• Using で for the place of existence. 部屋で机があります is wrong. Existence takes に; で belongs to actions. The confusion is understandable, because both translate as in or at.
• Using を instead of が. 本をあります is not a sentence. Existence is never transitive.
• Reaching for a verb meaning "have". There is not one. 姉を持っています is wrong; it is 姉がいます (ane ga imasu, "I have an older sister"). 持つ is for holding and carrying.
• Forgetting that plants are あります. A tree is alive, but it does not walk, so 木があります (ki ga arimasu, "there is a tree"). The rule is movement, not life.
• Assuming ありますか is only about existence. In a shop, ありますか is the normal way to ask whether something is in stock — これ、ありますか (kore, arimasu ka, "do you have this?"). It is a workhorse, not a narrow grammar point.

What to do with it

The animate split is worth internalising early, because it never goes away. The same いる that means "there is a person" is what you attach to the て-form to make 〜ている, the continuous and resulting-state pattern that appears in nearly every Japanese sentence you will ever read. And the に-plus-が shape reappears whenever you describe where something is or who has what.

If particles in general are still unclear, the particles introduction is the better starting point, and the ni-versus-de article settles the location question that trips up almost everyone here. For the past-tense side of these forms, the ta-form article explains how ありました and いました are built.

Romaji.live puts these two verbs right next to each other, on purpose: a sentence with 机の上に本があります and a sentence with 庭に犬がいます turn up in the same session, so the animate split stops being a rule you recite and becomes a choice you make without thinking. Start with the kana table if the characters are still slow, then take a practice session and type them word by word. If a reading is not what you expected, the romaji converter will spell out any sentence for you.