効能 30秒了解
- 効能 (kounou) means efficacy or beneficial effect.
- Used for medicines, treatments, health products.
- Implies a positive, inherent power to help.
- More formal than 'effect' (効果).
- Meaning
- The word 効能 (こうのう - kounou) refers to the efficacy, benefit, or the power of something to produce a desired effect. It's often used when discussing the positive outcomes or therapeutic properties of medicines, treatments, foods, or even certain practices.
- Usage Context
- You'll frequently encounter 効能 when reading product labels, health-related articles, or when discussing the effectiveness of remedies. For instance, a herbal tea might be advertised for its calming 効能, or a new medication might highlight its specific 効能 in treating a particular ailment.
- Nuance
- While it implies a positive effect, 効能 doesn't necessarily guarantee a cure. It speaks to the inherent capability of something to bring about a result. It's a more formal term than simply saying 'good effect' (良い効果 - yoi kouka) and carries a sense of established or proven effectiveness.
この薬には、痛みを和らげる 効能 があります。
このハーブティーは、リラックス効果の 効能 が期待できる。
- Synonym Hint
- Think of words like 'effectiveness,' 'virtue,' 'power,' or 'action' when trying to grasp the meaning of 効能.
- Basic Structure
- The most common way to use 効能 is in the structure: [Thing] は [Effect] の効能がある (wa [effect] no kounou ga aru) or [Thing] は [Effect] の効能を持つ (wa [effect] no kounou wo motsu). This translates to '[Thing] has the efficacy/benefit of [Effect].' You can also say [Thing] の効能は [Effect] です (no kounou wa [effect] desu), meaning 'The efficacy/benefit of [Thing] is [Effect].'
この温泉は、疲労回復の 効能 があると言われています。
- Describing Specific Benefits
- When you want to be more specific about the kind of benefit, you can use phrases like ～を改善する効能 (wo kaizen suru kounou - efficacy to improve ~) or ～を促進する効能 (wo sokushin suru kounou - efficacy to promote ~).
このサプリメントは、免疫力を高める 効能 があります。
- Using with Verbs
- Sometimes, you'll see verbs used in conjunction with 効能 to describe what the efficacy *does*. For example, 効能が現れる (kounou ga arawareru - efficacy appears/manifests) or 効能を発揮する (kounou wo hakki suru - efficacy is demonstrated/exerted).
この新しい治療法は、その 効能 を早くも発揮し始めている。
- Medical and Health Contexts
- This is arguably the most common place to hear 効能. Doctors, pharmacists, and medical professionals might discuss the 効能 of a drug. You'll see it on prescription labels, in health brochures, and in advertisements for over-the-counter medications. For example, a pain reliever might state its specific 効能 for headaches or muscle aches.
この薬の 効能 について、医師に確認しました。
- Traditional Medicine and Remedies
- In discussions about traditional Japanese medicine (Kampo), herbal remedies, or even natural health supplements, 効能 is frequently used. People might talk about the purported 効能 of certain herbs, teas, or natural ingredients for various ailments or for general well-being.
生姜には体を温める 効能 がある。
- Product Descriptions and Advertisements
- Cosmetics, health foods, and wellness products often highlight their 効能. Advertisements will boast about the 'skin-brightening 効能' of a cream or the 'digestive 効能' of a particular food. This is a way to emphasize the positive results consumers can expect.
この化粧品は、肌のハリを改善する 効能 を前面に出している。
- Confusing with General 'Effect'
- Learners might sometimes use 効能 when a more general term like 効果 (こうか - kouka) 'effect' or 影響 (えいきょう - eikyou) 'influence' would be more appropriate. 効能 specifically refers to the *beneficial* or *intended* power to produce a result, often in a therapeutic or medicinal context. Using it for any kind of effect can sound unnatural.
Incorrect: この雨は都市に良い 効能 をもたらした。
- Overusing in Casual Conversation
- 効能 is a relatively formal word. While you might hear it in casual conversation if someone is discussing a specific health product they are using, it's not typically used for everyday, minor positive outcomes. For instance, saying 'This coffee has the 効能 to wake me up' would sound a bit stiff; '効果' (kouka) or simply describing the effect would be more natural.
Too formal: このコーヒーは私を目覚めさせる 効能 がある。
- Misunderstanding the Scope
- 効能 implies a inherent power or capability. It's not just about a temporary or superficial result. If something has a 効能, it means it has the built-in ability to produce a certain beneficial outcome. Confusing this with a simple, observable effect can lead to misuse.
Incorrect: この装飾は部屋に美しい 効能 を与えた。
- 効能 (kounou) vs. 効果 (kouka)
- This is the most common point of confusion.
効能 (kounou): Refers to the inherent power or ability to produce a specific, beneficial effect, especially in medicine, health, or remedies. It emphasizes the 'virtue' or 'potency' of something.
効果 (kouka): A more general term for 'effect,' 'result,' or 'impact.' It can be positive, negative, or neutral, and applies to a wider range of situations, from scientific experiments to social phenomena.
Example:
薬の効能 (efficacy of medicine) vs. 薬の効果 (effect of medicine). The former emphasizes the medicine's inherent healing power, while the latter refers to the observable outcome of taking it.
Example 2:
この運動は健康に良い効能がある。(This exercise has beneficial virtues for health.)
この運動は健康に良い効果がある。(This exercise has a good effect on health.)
- 効能 (kounou) vs. 効き目 (kikime)
- 効き目 (kikime): Also means 'effect' or 'effectiveness,' but it's generally more colloquial and often used for things like medicines, pesticides, or tools. It focuses on how well something works in practice.
Example:
この薬は効能が高い。(This medicine has high efficacy.) - More formal, emphasizes inherent power.
この薬はよく効き目がある。(This medicine has a good effect.) - More common, focuses on practical effectiveness.
- 効能 (kounou) vs. 薬効 (yakkou)
- 薬効 (yakkou): This specifically refers to the 'medicinal effect' or 'pharmacological effect' of a drug or medicine. It's a more technical term within the medical field.
Example:
この植物には強力な薬効がある。(This plant has strong medicinal effects.) - More specific than 効能, focusing on the drug action.
- 効能 (kounou) vs. 作用 (sayou)
- 作用 (sayou): Means 'action,' 'function,' or 'effect.' It's a broad term describing how something works or what it does. It can be used in various fields, including science, mechanics, and biology.
Example:
この化学物質の作用を調べる。(To investigate the action of this chemical substance.)
この薬の効能は鎮痛作用によるものである。(The efficacy of this medicine is due to its analgesic action.) - Here, 作用 describes the mechanism behind 効能.
How Formal Is It?
趣味小知识
The kanji 効 (kou) itself is composed of 殸 (a phonetic component) and a stroke representing 'effect' or 'result.' The kanji 能 (nou) features a pictogram of a dancing figure, symbolizing skill or ability.
发音指南
- Pronouncing 'nou' as a single syllable 'no'.
- Putting stress on the second syllable.
- Mispronouncing the 'o' sound in 'ko'.
难度评级
Recognizing 効能 in written materials, especially on product labels, advertisements, and health-related articles, is common for B1 learners. Understanding its specific meaning in context is key.
接下来学什么
前置知识
接下来学习
高级
需要掌握的语法
Using の (no) to connect nouns and indicate possession or modification.
薬の効能 (kusuri no kounou - the efficacy of the medicine).
Using がある (ga aru) to indicate existence or possession.
この薬は効能がある。(Kono kusuri wa kounou ga aru. - This medicine has efficacy.)
Using を持つ (wo motsu) to indicate possession, often in a more formal context.
この植物は特別な効能を持つ。(Kono shokubutsu wa tokubetsu na kounou wo motsu. - This plant possesses special efficacy.)
Using verbs in their dictionary form before 効能 to specify the type of efficacy.
痛みを和らげる効能。(Itami wo yawarageru kounou - Efficacy to alleviate pain.)
Using particles like は (wa) and が (ga) to mark the subject or topic.
この薬は効能がある。( Kono kusuri wa kounou ga aru. - This medicine has efficacy.)
按水平分级的例句
このハーブティーは、リラックス効果の効能があると言われています。
This herbal tea is said to have the benefit of relaxation.
The phrase '～の効能がある' (no kounou ga aru) means 'has the efficacy/benefit of ~'.
このクリームは肌の炎症を抑える効能を持つ。
This cream possesses the efficacy to suppress skin inflammation.
'～の効能を持つ' (no kounou wo motsu) is another way to say 'has the efficacy/benefit of ~'.
新しい治療法の効能について、専門家が説明しました。
An expert explained about the efficacy of the new treatment method.
効能 (kounou) is a noun, often used as the subject or object in sentences.
この食品は、栄養価が高く、健康維持の効能が期待できる。
This food is highly nutritious and can be expected to have the benefit of maintaining health.
'～の効能が期待できる' (no kounou ga kitai dekiru) means 'can expect the efficacy/benefit of ~'.
医薬品の効能は、科学的に証明される必要がある。
The efficacy of pharmaceuticals needs to be scientifically proven.
This sentence uses a more formal tone, common when discussing medical products.
この温泉は、美肌効果の効能で有名です。
This hot spring is famous for its efficacy in beautifying the skin.
美肌効果 (bihada kouka) means 'skin beautifying effect'.
伝統的な薬草には、様々な効能があると考えられている。
Traditional medicinal herbs are thought to have various efficacies.
伝統的な薬草 (dentouteki na yakusou) means 'traditional medicinal herbs'.
このマッサージは、筋肉の痛みを和らげる効能がある。
This massage has the efficacy to alleviate muscle pain.
筋肉の痛み (kinniku no itami) means 'muscle pain'.
常见搭配
常用短语
— To have efficacy / To have a beneficial effect.
このお茶は、消化を助ける効能があると言われています。 (This tea is said to have the efficacy to aid digestion.)
— To possess efficacy / To have a beneficial effect.
この新しい技術は、生産性を向上させる効能を持つと期待されています。 (This new technology is expected to possess the efficacy to improve productivity.)
— To expect efficacy / To expect a beneficial effect.
このサプリメントの効能を期待して、毎日飲んでいます。 (I drink this supplement every day, expecting its efficacy.)
— To explain the efficacy / To explain the beneficial effect.
医師は、この薬の効能について詳しく説明してくれました。 (The doctor explained in detail about the efficacy of this medicine.)
— Efficacy shows / The beneficial effect is demonstrated.
臨床試験で、この薬の顕著な効能が示されました。 (The remarkable efficacy of this medicine was demonstrated in clinical trials.)
— Description of efficacy / Leaflet detailing benefits.
薬局で薬の効能書きを読みました。 (I read the description of efficacy for the medicine at the pharmacy.)
— Active medicinal ingredient / Ingredient with therapeutic effect.
この製品には、天然の薬効成分が豊富に含まれています。 (This product is rich in natural active medicinal ingredients.)
— Efficacy and effect (often used together in formal contexts).
この治療法の効能効果については、さらなる研究が必要です。 (Further research is needed regarding the efficacy and effect of this treatment method.)
— Outside the scope of efficacy / Unintended effect.
この症状は、この薬の効能外です。 (This symptom is outside the scope of this medicine's efficacy.)
— To claim efficacy / To advertise benefits.
この健康食品は、疲労回復の効能を謳っています。 (This health food claims the efficacy of fatigue recovery.)
容易混淆的词
効能 refers to the inherent power to produce a *beneficial* effect, especially in health contexts. 効果 is a more general term for 'effect' or 'result,' which can be positive, negative, or neutral, and applies to a wider range of situations.
効き目 is a more colloquial term for 'effectiveness' or 'how well something works,' often used for practical applications like medicines or pesticides. 効能 is more formal and emphasizes the inherent power or virtue.
作用 means 'action' or 'function,' describing *how* something works. 効能 describes the *beneficial result* of that action. For example, a drug's 作用 might be to inhibit an enzyme, leading to the 効能 of pain relief.
容易混淆
Both words relate to the result or impact of something.
効能 specifically denotes a beneficial, often therapeutic, power or virtue, particularly in health and medicine. 効果 is a broader term for any 'effect' or 'result,' which can be positive, negative, or neutral, and applies to a wider range of phenomena beyond health.
この薬は鎮痛の<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効能</mark>がある。(This medicine has the <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>efficacy</mark> for pain relief - emphasizing its inherent power.) この薬を飲んだら、すぐに<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効果</mark>があった。(After taking this medicine, there was an immediate <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>effect</mark> - referring to the observed outcome.)
Both refer to the effectiveness or impact of something, often medicines.
効き目 is more colloquial and practical, focusing on how well something 'works' in a straightforward sense, like a pesticide or a simple remedy. 効能 is more formal and emphasizes the inherent power, virtue, or specific therapeutic benefit, often in a more detailed or scientific context.
この薬は<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効能</mark>が高い。(This medicine has high <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>efficacy</mark> - formal, inherent power.) この薬はよく<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効き目</mark>がある。(This medicine has a good <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>effect</mark>/works well - colloquial, practical effectiveness.)
Both relate to how something influences or produces a result.
作用 means 'action' or 'function,' describing the mechanism or process by which something operates. 効能 refers to the specific, beneficial *outcome* or *result* of that action, particularly in health contexts. 作用 is the 'how,' and 効能 is the 'what good it does'.
この薬の<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>作用</mark>は、血管を拡張することだ。(The <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>action</mark> of this medicine is to dilate blood vessels - mechanism.) 血管拡張<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効能</mark>により、血圧が下がった。(Due to the <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>efficacy</mark> of vasodilation, blood pressure decreased - beneficial result.)
Both are related to the effects of medicine or treatments.
効能 refers to the intended, beneficial effects of a medicine or treatment. 副作用 refers to unintended, often negative or undesirable, effects that occur alongside the intended effects.
この薬には、鎮痛という<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効能</mark>がある。(This medicine has the <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>efficacy</mark> of pain relief - intended benefit.) しかし、眠気という<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>副作用</mark>もある。(However, it also has the <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>side effect</mark> of drowsiness - unintended effect.)
Both relate to the success or positive impact of something.
有効 means 'effective,' 'valid,' or 'in effect,' describing something that is currently working or has legal force. 効能 refers to the specific *power* or *benefit* that makes something effective. You could say a medicine has 効能, and therefore it is 有効.
この治療法は<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>有効</mark>であることが証明された。(This treatment method was proven to be <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>effective</mark>.) その<mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>効能</mark>により、病状が改善した。(Due to that <mark class='bg-yellow-200 dark:bg-yellow-800 px-0.5 rounded'>efficacy</mark>, the patient's condition improved.)
句型
[Thing] は [Benefit] の効能がある。
このハーブは、安眠の効能がある。
[Thing] は [Benefit] の効能を持つ。
この化粧水は、保湿の効能を持つ。
[Thing] の効能は [Description] です。
この温泉の効能は、疲労回復です。
[Verb] 効能
痛みを和らげる効能
効能 + が + 現れる/示される
薬の効能がすぐに現れた。
[Thing] は [Benefit] の効能が期待できる。
この新しい運動は、健康増進の効能が期待できる。
専門家は [Thing] の効能について説明した。
専門家は、この治療法の効能について説明した。
この [Product] は、[Benefit] の効能を謳っている。
この健康食品は、免疫力を高める効能を謳っている。
词族
名词
动词
相关
如何使用
High in specific contexts (medical, health, wellness products).
-
Using 効能 for any kind of 'effect'.
→
Using 効果 (kouka) for general effects.
Learners often confuse 効能 with 効果. 効能 is specific to beneficial, often therapeutic, powers. For example, the 'effect' of rain is not its 効能, but its 効果. However, the 'efficacy' of rain for drought-stricken plants could be considered its 効能.
-
Using 効能 in very casual conversation.
→
Using 効き目 (kikime) or simply describing the result.
効能 is a more formal term. Saying 'This coffee has the 効能 to wake me up' sounds stiff. A more natural phrase would be 'This coffee really wakes me up' (このコーヒーはよく効くよ - kono koohii wa yoku kiku yo) or 'This coffee has the effect of waking me up' (このコーヒーは眠気を覚ます効果がある - kono koohii wa nemuke wo samasu kouka ga aru).
-
Confusing 効能 with 作用 (sayou).
→
Understanding 作用 as the mechanism and 効能 as the beneficial result.
作用 means 'action' or 'function' (how it works). 効能 is the beneficial 'effect' or 'power' that results from that action. For instance, a medicine's 作用 might be to block pain signals, and its 効能 is pain relief.
-
Treating 効能 as a verb.
→
Using it as a noun, often with verbs like 'aru' or 'motsu'.
効能 is a noun. You don't say '効能する' (kounou suru). Instead, you say '効能がある' (kounou ga aru - has efficacy) or '効能を持つ' (kounou wo motsu - possesses efficacy).
-
Not specifying the type of benefit when using 効能.
→
Using phrases like '[Verb] 効能' or '[Noun describing benefit] 効能'.
While 効能 alone implies a beneficial effect, it's often clearer and more natural to specify what that benefit is. For example, instead of just saying 'This herb has 効能,' say 'This herb has the 効能 to calm the nerves' (このハーブは神経を落ち着かせる効能がある - kono haabu wa shinkei wo ochitsukaseru kounou ga aru).
小贴士
Distinguish from 効果 (kouka)
Remember that 効能 specifically refers to the inherent, beneficial power or efficacy, often in a medical or health context. 効果 is a more general term for any 'effect' or 'result,' which can be positive, negative, or neutral. When in doubt, consider if you're talking about a specific, positive, inherent ability (効能) or a general outcome (効果).
Common Patterns
Look out for patterns like '[Thing] は [Benefit] の効能がある' (has the efficacy of...) or '[Verb] 効能' (efficacy to [verb]). These structures are frequently used to describe what something can do.
Health and Medicine Focus
効能 is most frequently encountered when discussing medicines, health supplements, traditional remedies, or wellness products. Pay attention to packaging and advertisements in these areas to see how it's used.
Stress the First Syllable
The word 効能 (kounou) has the primary stress on the first syllable: 効 (こう - kou). The 'nou' sound is a diphthong (like 'noh-oo').
Formal vs. Informal
効能 is a relatively formal term. While you might hear it in discussions about health products, more casual contexts might use 効き目 (kikime) or simply describe the result. Stick to 効能 for written materials and more serious discussions.
Connect with 'King' and 'Ability'
Use the mnemonic: Imagine a 'king' (効 sounds like 'kou') who has the 'ability' (能 - nou) to heal. His 'efficacy' (効能) is legendary. This helps link the meaning to the sounds.
Appreciation for Natural Benefits
Japanese culture often values natural remedies and specific health benefits. 効能 reflects this by highlighting the inherent positive power of substances and treatments.
Know Your Alternatives
Be aware of synonyms like 効果 (general effect), 効き目 (practical effectiveness), and 薬効 (medicinal effect). Choosing the right word depends on the nuance and formality you need.
Sentence Building
Actively try to create sentences using 効能. For instance, think of a fruit and describe its health 効能. This active recall strengthens your understanding and usage.
Avoid Overstatement
While 効能 implies a strong benefit, be careful not to overstate claims, especially in advertising, as this can be misleading. Use it accurately to describe proven or expected beneficial powers.
记住它
记忆技巧
Imagine a 'king' (効 - sounds like 'kou') who has the 'ability' (能 - nou) to heal all his subjects. The king's 'efficacy' (効能) is legendary.
视觉联想
Picture a powerful ancient king wearing ornate robes, holding a glowing elixir. He is the embodiment of 'efficacy' (効能) because of his inherent power and ability to bring about good health.
Word Web
挑战
Try to think of three different things (a food, a drink, a type of exercise) and describe their potential 効能 in simple Japanese sentences.
词源
The word 効能 is composed of two kanji: 効 (kou) and 能 (nou). The kanji 効 means 'effect,' 'efficacy,' or 'to be effective.' The kanji 能 means 'ability,' 'skill,' or 'power.' Together, they literally mean 'the ability to have an effect' or 'the power of efficacy.'
原始含义： The combination of 'effect' and 'ability' points to an inherent capacity to produce a result.
Sino-Japanese (derived from Chinese characters)文化背景
When discussing health and medicine, it's important to use precise language. While 効能 implies a beneficial effect, it's crucial not to overstate claims, especially in advertising, to avoid misleading consumers. Scientific validation often underpins the accepted 効能 of many products.
In English-speaking cultures, we often use terms like 'efficacy,' 'benefit,' 'active ingredient,' or 'therapeutic properties.' While 'efficacy' is a direct translation, 'benefit' is more commonly used in everyday conversation when discussing health products.
在生活中练习
真实语境
Reading medicine labels or drug information leaflets.
- この薬の効能
- 効能・効果
- 効能書き
- 副作用
Discussing health supplements or traditional remedies.
- ～の効能がある
- 健康維持の効能
- 天然の効能
- 期待できる効能
Looking at advertisements for cosmetics or health foods.
- 美肌の効能
- 疲労回復の効能
- 効能を謳う
- 実感できる効能
Consulting with a doctor or pharmacist.
- この薬の効能について
- 効能を説明してください
- 効能外の効果
- 薬効成分
Reading articles about health and wellness.
- ～の効能が科学的に証明された
- 体に良い効能
- 効能を最大限に引き出す
- 伝統的な効能
对话开场白
"最近、健康のために何か新しいことを始めましたか？その効能についてどう思いますか？"
"この薬の効能について、何か知っていますか？"
"広告で「〇〇の効能がある」とよく見かけますが、本当だと思いますか？"
"昔から伝わる薬草には、どんな効能があると言われていますか？"
"このサプリメント、使ってみたんだけど、効能がすごいんだよ！"
日记主题
What are some common health products you use, and what are their advertised 効能?
Think about a time you experienced a noticeable benefit from a medicine or remedy. How would you describe its 効能?
Imagine you are creating a new health product. What kind of 効能 would you want it to have, and how would you describe it?
Compare and contrast the nuances of 効能, 効果, and 効き目. When would you use each word?
Reflect on a cultural practice or food that is believed to have health benefits. What is its purported 効能?
常见问题
10 个问题効能 (kounou) refers to the inherent power or ability to produce a beneficial effect, especially in medicine or health. It's about the 'virtue' or 'potency.' 効果 (kouka) is a more general term for 'effect' or 'result,' which can be positive, negative, or neutral, and applies to a wider range of situations. For example, the 効能 of a medicine is its healing power, while the 効果 of taking it is that your pain goes away. The 効能 of a storm might be to bring rain, but its 効果 could be flooding.
効能 is most appropriately used when discussing the specific, beneficial power or efficacy of things like medicines, health treatments, natural remedies, or even certain foods and practices that are known to improve health or well-being. It's common on product labels, in medical discussions, and in health-related articles.
While primarily used for health and medicinal contexts, you might occasionally see 効能 used metaphorically for things that have a strong, positive, and inherent power to produce a desired outcome, even outside of strict health. However, this is less common, and 効果 (kouka) would usually be preferred for general effects.
Yes, 効能 is generally considered a formal or semi-formal word. It's commonly found in written materials like product descriptions, medical documents, and academic texts. In casual conversation, people might use more colloquial terms like 効き目 (kikime) or simply describe the effect.
効能書き (kounougaki) literally means 'description of efficacy.' It refers to the written information, often found on packaging or in leaflets, that details the intended benefits and effects of a product, especially medicines or health supplements.
No, 効能 itself is inherently positive, referring to beneficial effects. However, discussions often involve its counterpoints like 副作用 (fukusayou - side effects) or 無効 (mukou - ineffective), which highlight the limitations or potential downsides associated with treatments.
薬効 (yakkou) is a more specific term that means 'medicinal effect' or 'pharmacological effect.' It's a subset of 効能, focusing solely on the therapeutic properties of drugs. You could say a drug has 効能, and its 薬効 is the specific mechanism or action that produces that 効能.
Certainly. For example: 「このヨーグルトは、腸内環境を整える効能があると言われています。」(Kono yooguruto wa, chounai kankyou wo totonoeru kounou ga aru to iwarete imasu.) This translates to: 'This yogurt is said to have the efficacy to regulate the intestinal environment.'
効能 (kounou) refers to the inherent power or capacity to produce a specific beneficial result, especially in a health context. 利点 (riten) means 'advantage' or 'merit,' referring to the positive aspects or benefits something offers in a broader sense. For example, a car's 効能 might be its efficient engine (if it were a health product), but its 利点 are speed, comfort, and convenience.
A mnemonic could be: Imagine a 'king' (効 sounds like 'kou') who has the 'ability' (能 - nou) to heal. His 'efficacy' (効能) is legendary. Or, think of a 'key' (key sounds like 'kou') that unlocks the 'ability' (能 - nou) to feel better – the key's efficacy is its power to open the door to wellness.
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Summary
効能 (kounou) refers to the specific, beneficial power or efficacy of something, most commonly used when discussing medicines, health treatments, or wellness products, highlighting their inherent ability to produce positive results.
- 効能 (kounou) means efficacy or beneficial effect.
- Used for medicines, treatments, health products.
- Implies a positive, inherent power to help.
- More formal than 'effect' (効果).
Distinguish from 効果 (kouka)
Remember that 効能 specifically refers to the inherent, beneficial power or efficacy, often in a medical or health context. 効果 is a more general term for any 'effect' or 'result,' which can be positive, negative, or neutral. When in doubt, consider if you're talking about a specific, positive, inherent ability (効能) or a general outcome (効果).
Common Patterns
Look out for patterns like '[Thing] は [Benefit] の効能がある' (has the efficacy of...) or '[Verb] 効能' (efficacy to [verb]). These structures are frequently used to describe what something can do.
Health and Medicine Focus
効能 is most frequently encountered when discussing medicines, health supplements, traditional remedies, or wellness products. Pay attention to packaging and advertisements in these areas to see how it's used.
Stress the First Syllable
The word 効能 (kounou) has the primary stress on the first syllable: 効 (こう - kou). The 'nou' sound is a diphthong (like 'noh-oo').
例句
この温泉は疲労回復に効能があると言われている。
