可能

The Japanese word 可能 (かのう - kanō) is a fundamental term that translates to 'possible' or 'feasible' in English. While it shares semantic space with the common verb dekiru (to be able to), 可能 is a na-adjective (and sometimes a noun) that carries a much more formal, objective, and analytical nuance. It is the word of choice when discussing technical feasibility, legal permissions, or logical possibilities in a professional or academic setting. When you use 可能, you are moving away from personal 'can-do' attitudes and toward an assessment of external reality and systemic constraints. It is the difference between saying 'I can go' and 'Attendance is possible.'

Grammatical Category

Na-Adjective (形容動詞) and Noun (名詞). It often appears as 可能だ or 可能です.

Core Nuance

Objective feasibility. It answers the question: 'Does the current environment, technology, or law allow for this to happen?'

Formal vs. Informal

Highly formal. In casual speech, people prefer dekiru or the potential form of verbs (e.g., yomeru instead of yomu koto ga kanō).

In a business context, 可能 is indispensable. If a client asks if a feature can be implemented by next week, a professional response would involve 可能 to indicate a technical assessment. For example, 'Raishū made ni jissō suru koto wa kanō desu' (Implementation by next week is possible). This sounds much more authoritative and well-considered than the simpler dekimasu, which might sound like a personal promise rather than a project management fact. Furthermore, the word is frequently combined with other kanji to create complex nouns like 可能性 (kanōsei) meaning 'possibility' or 'potential,' and 不可能 (fukanō) meaning 'impossible.'

The kanji themselves tell a story. 可 (ka) means 'to permit' or 'to be acceptable,' while 能 (nō) means 'ability' or 'function.' Together, they represent the 'ability to be permitted' by the laws of nature or society. This is why you see 可能 on signs regarding parking (駐車可能 - chūsha kanō) or in technical manuals regarding compatibility (接続可能 - setsuzoku kanō). It is a word that defines the boundaries of what can happen within a system. Understanding 可能 is key to mastering formal Japanese and navigating professional environments where precision is valued over conversational ease.

Finally, it is worth noting that 可能 is often used in the structure [Verb Dictionary Form] + koto wa kanō da. This nominalizes the action, making the sentence sound like a statement of fact. For instance, 'Aruku koto wa kanō da' (Walking is possible) might be said by a doctor assessing a patient's recovery. It sounds objective and based on medical evidence. In contrast, 'Arukeru' (I can walk) sounds like the patient's own subjective feeling. This distinction is vital for B1 learners who are starting to differentiate between subjective and objective modes of expression in Japanese.

Using 可能 (kanō) correctly requires understanding its role as a na-adjective. Unlike verbs that change their endings to indicate potential (like taberu becoming taberareru), 可能 is a static descriptor. You apply it to nouns or nominalized phrases to state that they possess the quality of being 'possible.' The most common structure is [Noun] + wa + kanō desu. This is frequently seen in customer service and technical documentation. For example, 'Yoyaku wa kanō desu' (Reservation is possible). If you want to use it with an action, you must first turn that action into a noun using koto: 'Kansetsu suru koto wa kanō desu' (Observing is possible).

Structure 1: Noun + は可能だ

Used for simple availability. 'Shūri wa kanō desu' (Repair is possible).

Structure 2: Verb (Dictionary) + ことは可能だ

Used for the feasibility of actions. 'Kyoka o eru koto wa kanō da' (It is possible to obtain permission).

Structure 3: Compound Nouns

Attaching 可能 directly to other nouns. 'Saisei-kanō enerugī' (Renewable energy).

One of the most powerful ways to use 可能 is in its negative form, 不可能 (fukanō). While 'impossible' in English can sometimes sound dramatic, 不可能 in Japanese is often used to state a hard limit or a logical dead-end. In a business negotiation, saying 'Sore wa dekimasen' (I can't do that) can feel like a personal refusal. However, saying 'Sore wa fukanō desu' (That is impossible) implies that the constraints of the situation—time, budget, or physics—simply do not allow for it. It removes the personal blame and focuses on the reality of the situation. This is a crucial strategy for polite but firm communication in Japanese culture.

In academic writing, 可能 is used to hypothesize. Researchers will write 'Kore wa riron-teki ni kanō de aru' (This is theoretically possible). Here, the use of de aru instead of da or desu further elevates the formality. If you are preparing for the JLPT N3 or N2, you will notice that 可能 often appears in reading passages about technology or social trends. It is used to discuss what society 'can' achieve, such as 'Kōreisha ga hataraki-tsuzukeru koto ga kanō na shakai' (A society where it is possible for the elderly to continue working). This usage highlights the word's role in describing systemic potential rather than individual capability.

Lastly, consider the word 可能性 (kanōsei). By adding the suffix -sei (nature/quality), you create the noun 'possibility.' This is used with the particles ga aru (there is) or ga takai (is high). For example, 'Seikō suru kanōsei ga aru' (There is a possibility of success). This is a very common way to express probability in Japanese. While 可能 says 'it can happen,' 可能性 discusses the 'chance' of it happening. Mastering these variations allows you to express a wide range of nuances regarding potential outcomes, making your Japanese sound more sophisticated and precise.

You will encounter 可能 (kanō) in almost every formal or semi-formal environment in Japan. If you are traveling, you will see it on digital displays at train stations and airports. For instance, a sign might read 'Yasumi no hi demo riyō kanō' (Available even on holidays). In this context, it functions as a clear, unambiguous indicator of service availability. It is much more common in written signage than the verb dekiru because it is concise and carries a sense of official authorization. When you see 可能 on a sign, it isn't just a suggestion; it is a statement of the rules or the system's current state.

In the Office

Used in meetings to discuss project feasibility, deadlines, and resource allocation. 'Is this budget possible?' (Kono yosan de kanō desu ka?)

In News and Media

Used to report on scientific breakthroughs, political possibilities, or weather-related risks. 'Is a recovery possible?' (Kaifuku wa kanō ka?)

In Technology

Used in UI/UX design. Buttons might be 'Clickable' (Kurikku kanō) or files might be 'Downloadable' (Daunrōdo kanō).

In the realm of Japanese customer service, 可能 is a polite way to confirm what can be done for a customer. If you ask a hotel clerk if you can check in early, they might respond, 'O-heya no junbi ga dekite ireba, kanō desu' (If the room is ready, it is possible). Using 可能 here sounds more professional and less personal than saying 'dekimasu.' It implies that the 'possibility' is governed by the hotel's policy and the room's status, rather than the clerk's personal whim. This subtle shift is a hallmark of keigo (honorific speech) culture, even though 可能 itself is not a specific honorific word.

Another common place to hear 可能 is in sports commentary or gaming. Commentators might discuss whether a comeback is 可能 (Gyakuten wa kanō ka?). In video games, you'll see it in settings menus: 'Henkō kanō' (Changeable/Adjustable). In these contexts, it serves as a quick way to communicate the state of the game or the system. It’s also used in the phrase 'Kanōsei wa zero de wa nai' (The possibility is not zero), a dramatic cliché often heard in anime or movies when a character is facing impossible odds. This phrase highlights how 可能 and its derivatives are used to weigh the chances of success in high-stakes situations.

Finally, in the academic and scientific world, 可能 is the standard term for 'feasibility.' Research papers on engineering, medicine, or economics will frequently use 'kanōsei o kentō suru' (examine the possibility) or 'jisshi kanō na' (implementable). For a student or professional in Japan, being able to use 可能 correctly in a report is a sign of high-level literacy. It shows that you can separate your personal desires from the objective facts of your research. Whether you are reading a scientific journal or a simple instruction manual, 可能 is the word that defines what can and cannot be done in the world of facts.

The most frequent mistake English speakers make with 可能 (kanō) is using it in casual, everyday conversation where dekiru (to be able to) or the potential form of a verb is much more natural. For example, if a friend asks if you can come to a party, saying 'Sanka wa kanō desu' (Participation is possible) sounds incredibly stiff and robotic—almost as if you are a computer processing a request. In this situation, 'Ikemasu' (I can go) or 'Ikeru yo' is the correct choice. 可能 should be reserved for situations where you are talking about objective feasibility, not personal plans or skills.

Mistake 1: Personal Skills

Don't say 'Nihongo o hanasu koto wa kanō desu' to mean 'I can speak Japanese.' Say 'Nihongo ga hanasemasu.'

Mistake 2: Casual Plans

Don't say 'Ashita au koto wa kanō?' to a friend. Say 'Ashita aeru?' or 'Ashita daijōbu?'

Mistake 3: Confusing with 'Ariuru'

'Kanō' is about feasibility; 'Ariuru' is about logical possibility (could happen). They are not always interchangeable.

Another common error involves the grammar of 可能. Because it is a na-adjective, learners sometimes forget to use the 'na' when it modifies a noun. You cannot say 'kanō keikaku'; it must be 'kanō na keikaku' (a possible plan). Similarly, when using it as an adverb, you must use 'ni,' as in 'kanō na kagiri' (as much as possible). However, in compound words like 'jitsugen-kanō' (realizable), the 'na' is dropped because it has become a single compound noun. This distinction between the adjective use and the compound use can be tricky for B1 learners.

A third mistake is using 可能 when you actually mean 'permission' in a social sense. While 可能 can mean 'permitted' in a technical or legal sense (like 'chūsha kanō'), you wouldn't use it to ask your boss if you can leave early. For that, you would use '～てもいいですか' (Is it okay if I...?). Using 可能 in that context makes it sound like you are asking if it is physically or logically possible for you to leave, rather than asking for the social grace to do so. This nuance is vital for maintaining proper social harmony (wa) in Japanese interactions.

Lastly, be careful with the word 可能性 (kanōsei). English speakers often say 'There is a possibility that...' and translate it directly as 'kanōsei ga aru.' While this is often correct, Japanese speakers sometimes prefer other expressions like '～かもしれない' (might) or '～おそれがある' (there is a fear/risk that) depending on the certainty and the desirability of the outcome. 可能性 is neutral, but if you are talking about a negative outcome, 'osore ga aru' is often more natural. Over-relying on 可能 and its derivatives can make your Japanese sound translated rather than native.

To truly master 可能 (kanō), you must understand how it relates to its synonyms and alternatives. The most obvious alternative is 出来る (dekiru). As discussed, dekiru is the versatile, everyday word for 'can.' It covers ability, possibility, and even completion (like 'the food is ready'). 可能 is a subset of dekiru that specifically focuses on formal, objective feasibility. If dekiru is a Swiss Army knife, 可能 is a specialized surgical scalpel. You use it when you need to be precise about the 'possibility' of a situation.

可能 (Kanō) vs. 出来る (Dekiru)

可能: Formal, objective, used for systems and feasibility. 出来る: Casual/Neutral, subjective, used for personal skills and general 'can'.

可能 (Kanō) vs. あり得る (Ariuru)

可能: Can it be done? (Feasibility). あり得る: Could it happen? (Logical possibility of an event).

可能 (Kanō) vs. 宜しい (Yoroshii)

可能: Is it possible? 宜しい: Is it acceptable/permitted? (Social permission).

Another interesting comparison is with 得る (uru / eru). This is a more literary or formal way to say 'can' or 'is possible.' It is often used in the form 'ari-uru' (possible to exist/happen) or 'shiri-uru' (possible to know). While 可能 describes the state of being possible, uru is a verb that attaches to other verbs. For example, 'Kore wa okori-uru mondai da' (This is a problem that could possibly occur). 可能 would be used differently: 'Okiru koto wa kanō da' (It is possible for it to occur). The latter sounds more like a technical assessment, while the former sounds like a logical observation.

In the context of 'potential,' you might also encounter 潜在的 (senzai-teki). This means 'latent' or 'potential' in the sense of hidden power or unseen possibilities. While 可能 is about whether something can be done, senzai-teki is about something that exists but hasn't manifested yet. For example, 'senzai-teki na nōryoku' (potential ability). If you are talking about a student's potential, you use senzai-teki or kanōsei, but you wouldn't say the student is kanō. This distinction helps you avoid the 'robot' sound and speak more like a native.

Finally, consider the word 蓋然性 (gaizensei). This is a very high-level (N1+) word that means 'probability' or 'likelihood' in a philosophical or legal sense. While 可能 is a binary (possible or not), gaizensei is a spectrum. You won't use this in daily life, but seeing it in a book helps you realize where 可能 sits on the ladder of Japanese vocabulary. It is the solid, middle-ground word for feasibility that every B1 learner needs to master before moving on to these more abstract concepts.