開けます (開ける)

The Japanese verb 開ける (akeru), often used in its polite form 開けます (akemasu), is a fundamental transitive verb that primarily means 'to open.' In the Japanese language, verbs are strictly categorized by their transitivity, and akeru is the active counterpart to the intransitive verb aku (to be open). When you use akeru, you are describing an action performed by an agent—usually a person—on an object to change its state from closed to open. This verb is ubiquitous in daily life, covering everything from physical barriers like doors and windows to containers like boxes, bottles, and bags. It is one of the first verbs a student of Japanese learns because it facilitates basic requests and descriptions of common actions.

Transitive Nature

This verb requires a direct object marked by the particle 'o' (を). You are the one doing the opening.

Physical Scope

Used for doors, windows, lids, drawers, and eyes. It implies removing a barrier to create an entrance or exit.

Beyond physical objects, akeru extends into more abstract or functional domains. For instance, it is used when a shopkeeper opens their store for business or when a doctor asks a patient to open their mouth. It can also refer to 'clearing' or 'making' space or time, such as 'opening up' a schedule. Understanding the breadth of akeru requires recognizing that it focuses on the act of creating a passage or an opening where there was previously a closure. It is distinct from its synonym hiraku, which often implies a more metaphorical or 'unfolding' type of opening, such as opening a book or a flower blooming.

In social contexts, the use of akemasu vs akeru follows standard Japanese politeness rules. You will use akemasu with teachers, strangers, or in professional settings. The plain form akeru is reserved for friends, family, or when speaking to yourself. Interestingly, the verb is also used in the context of time, specifically 'the dawning of a new year' (toshi ga akeru), though the kanji used there is sometimes different (明ける), the phonetic root and the concept of 'opening' into a new period remain connected in the Japanese linguistic consciousness.

Common Collocations

Mado o akeru (Open window), Doa o akeru (Open door), Kuchi o akeru (Open mouth), Bin o akeru (Open bottle).

Using 開ける (akeru) correctly involves understanding its conjugation as a Group 2 (Ichidan) verb and its grammatical placement within a sentence. Because it is a transitive verb, the most critical element is the object being opened, which must be followed by the object marker o (を). The basic sentence structure follows the pattern: [Subject] wa [Object] o [Verb]. For example, 'Watashi wa doa o akemasu' (I open the door). In Japanese, the subject is frequently omitted if it is clear from context, making 'Doa o akemasu' a perfectly complete and natural sentence.

Polite Conjugation (Masu-form)

Present: Akemasu (開けます), Past: Akemashita (開けました), Negative: Akemasen (開けません).

Te-form (Requests/Sequencing)

Akete (開けて). Used with 'kudasai' for requests: 'Akete kudasai' (Please open).

One of the most common ways you will encounter akeru is in the potential form, akerareru (can open). In casual speech, this is often shortened to akereru. If you are struggling with a tight jar lid, you might say 'Akirarenai!' (I can't open it!). Conversely, if you are asking someone to perform the action for you, the te-form is essential. 'Mado o akete moraemasu ka?' (Could you open the window for me?) is a polite way to ask for a favor. This verb also pairs well with auxiliary verbs to express intent or state, such as akete oku (to open something in advance for future use).

In more complex sentences, akeru can be used to describe the purpose of an action. For example, 'Kagi o tsukatte, doa o akemasu' (Using a key, I open the door). Here, the te-form of 'tsukau' (to use) connects the tool to the action. You can also use the conditional form akereba or aketara to describe consequences: 'Mado o aketara, suzushiku narimashita' (When I opened the window, it became cool). This demonstrates how the verb functions as a trigger for a change in environment or state.

Negative Forms

Akenai (Plain Negative), Akemasen (Polite Negative). Used when something won't open or you choose not to open it.

The word 開ける (akeru) is a staple of Japanese daily life, and you will hear it in a wide variety of settings, from the most mundane to the highly professional. One of the first places a traveler will encounter it is on public transportation. While train doors usually open automatically (described by the intransitive aku), announcements might use akeru when referring to the staff's actions or when instructing passengers. For example, 'Doa o akemasu node, go-chuui kudasai' (We are opening the doors, so please be careful). This usage highlights the intentionality behind the action.

In the Classroom

Teachers frequently say 'Mado o akete kudasai' (Please open the window) or 'Hako o akete' (Open the box) during activities.

At the Doctor's

The dentist or physician will invariably say 'Kuchi o ookiku akete kudasai' (Please open your mouth wide).

In retail and service industries, akeru is used to discuss business hours. A shop assistant might tell a customer, 'Ashita wa kuji ni mise o akemasu' (We open the shop at 9:00 tomorrow). In a restaurant, if you are struggling with a bottle of wine or a difficult container, a waiter might offer, 'O-ake shimashou ka?' (Shall I open it for you?), using the humble form of the verb. This shows how the word adapts to different levels of Japanese social hierarchy. You'll also hear it in domestic settings constantly: 'Reizouko o akenai de!' (Don't open the fridge!) or 'Kaban o akete misete' (Open your bag and show me).

In media, such as anime or drama, characters often use akeru in dramatic moments—opening a forbidden door, a mysterious letter, or even 'opening' a path to the future. In sports, a commentator might say 'Ten-sa o aketa' (Opened up a point gap), showing the verb's versatility in describing the creation of distance or space. Even in technology, while 'hiraku' is often used for opening files or apps, 'akeru' can be heard when referring to physical hardware, like opening the back of a computer or a battery compartment.

Social Etiquette

In Japan, it is polite to ask 'Akete mo ii desu ka?' before opening a window in a shared space like an office or a bus.

The most frequent mistake English speakers make with 開ける (akeru) is confusing it with its intransitive partner, 開く (aku). In English, the word 'open' can be both transitive ('I open the door') and intransitive ('The door opens'). In Japanese, these are two distinct verbs. If you say 'Doa ga akemasu,' it sounds like the door itself is performing the action of opening something else, which is nonsensical. You must use 'Doa o akemasu' (I open the door) or 'Doa ga akimasu' (The door opens). Remembering that akeru always takes an object (marked by o) is the key to avoiding this error.

Akeru vs. Hiraku

While both mean 'to open,' 'akeru' is for physical barriers (doors, lids), whereas 'hiraku' is for things that unfold (books, umbrellas, flowers) or abstract things (meetings, businesses).

Akeru vs. Tsukeru

In English, we 'open' a light or 'open' the TV. In Japanese, you must use 'tsukeru' (to turn on). Saying 'Terebi o akeru' literally means you are taking the TV apart with a screwdriver.

Another common pitfall is the misuse of akeru for 'opening' a book. While native speakers will understand 'Hon o akete kudasai,' the more natural and standard verb for books, magazines, or newspapers is hiraku (開く). This is because a book 'unfolds' from a central spine, rather than acting as a lid or a sliding barrier. Similarly, for umbrellas, the correct verb is sasu (to hold/open an umbrella) or hiraku, never akeru. Learners often over-rely on akeru as a one-size-fits-all translation for 'open,' but Japanese precision requires selecting the verb based on the physical motion involved.

Confusion also arises with the verb akiru (to get tired of), which sounds similar but has a completely different meaning and kanji (飽きる). Furthermore, the potential form akerareru is often confused with the passive form, which is identical in Group 2 verbs. Context is vital: 'Doa ga akerareta' could mean 'The door was opened (by someone)' or 'I was able to open the door.' Beginners should focus on the basic transitive usage first before diving into these more complex overlapping forms. Finally, remember that 'opening' a computer file is almost always 'hiraku' in a digital context.

The 'Aku' Trap

If you see the particle 'ga', use 'aku'. If you see 'o', use 'akeru'. This is the golden rule for beginners.

While 開ける (akeru) is the most common way to say 'to open,' Japanese has several other verbs that describe opening in different ways. Understanding these nuances is essential for moving beyond basic proficiency. The most significant alternative is 開く (hiraku). While they share the same kanji, hiraku is used for things that open from a center point or unfold, like a flower, an umbrella, or a book. It is also used for opening a business or an event in a more formal or conceptual sense. If you 'open' a meeting, you use hiraku, not akeru.

開ける (akeru) vs. 開く (hiraku)

Akeru: Physical barriers, lids, windows. Hiraku: Unfolding objects, books, events, businesses.

開く (aku)

The intransitive version. Use this when the object opens by itself or you are describing its state (e.g., 'The door is opening').

Another related verb is 開封する (kaifuu suru), which specifically means 'to unseal' or 'to open an envelope/package.' This is more formal and technical than akeru. In a business email, you might see 'Mail o kaifuu shite kudasai' (Please open/unseal the mail). For 'opening' a new path or a new era, the verb 切り開く (kirihiraku) is used, which literally means 'to cut open.' This carries a sense of effort and overcoming obstacles. If you are 'opening' a gap or space between things, 空ける (akeru)—using a different kanji—is the correct choice, though they are pronounced the same.

In the context of 'opening' a computer file or a web page, 開く (hiraku) is the standard term used in software interfaces. For example, 'Fairu o hiraku' (Open a file). If you are 'opening' a bank account, the term is 口座を作る (kouza o tsukuru - make an account) or 開設する (kaisetsu suru - establish/open). These examples show that while akeru is a powerful and versatile verb, Japanese often employs more specific kanji-compounds (kango) for professional or technical actions. Finally, 公開する (koukai suru) means 'to open to the public' or 'to release,' such as a movie or a document.

Summary of Alternatives

Use 'akeru' for physical lids/doors. Use 'hiraku' for unfolding/events. Use 'kaifuu' for mail. Use 'kaisetsu' for accounts.