詳しく

The Japanese adverb 詳しく (kuwashiku) is the adverbial form of the i-adjective kuwashii. At its core, it describes an action performed with a high degree of detail, precision, or thoroughness. When you ask someone to explain something 詳しく, you are not just asking for a summary; you are asking for the 'nitty-gritty,' the specific data points, and the full context that surrounds a topic. It is one of the most versatile adverbs in the Japanese language, appearing in everything from casual conversations among friends to high-level technical manuals and academic lectures.

Core Concept

The transition from a general overview to a specific, granular examination of facts or instructions.

In a social context, using 詳しく often signals a deep interest in what the other person is saying. For instance, if a friend mentions they went on a trip, saying '詳しく教えて!' (Tell me more in detail!) shows enthusiasm and engagement. Conversely, in a professional setting, '詳しく説明してください' (Please explain in detail) is a standard request for clarity during a presentation or a meeting. It bridges the gap between ambiguity and understanding. The word implies a sense of completeness; nothing of importance should be left out when an action is done kuwashiku.

Furthermore, 詳しく is frequently paired with verbs related to information processing. Verbs like 調べる (shiraberu - to investigate), 聞く (kiku - to listen/ask), and 書く (kaku - to write) are natural partners for this adverb. When you investigate something kuwashiku, you are performing a deep dive. When you write something kuwashiku, you are producing a comprehensive document. This versatility makes it an essential tool for any learner aiming to move beyond basic survival Japanese into more expressive and precise communication. It allows you to control the flow of information by specifying the depth of the content you are providing or requesting.

Interestingly, the word also carries a nuance of expertise. Since the adjective kuwashii can mean 'to be well-informed about' (e.g., Kare wa PC ni kuwashii - He knows a lot about PCs), the adverb kuwashiku subtly suggests that the resulting explanation or investigation will be of high quality, reflecting a deep understanding of the subject matter. It is not just about the quantity of words, but the quality of the insight provided. In Japanese culture, where clarity can sometimes be sacrificed for politeness or brevity, explicitly asking for something kuwashiku is a clear directive that you value precision over vague generalities.

Register Note

Very common in both Teinei-go (polite) and Tamago (casual) speech. In extremely formal business writing, you might see 'shousai ni' (詳細に) instead.

To truly master 詳しく, one must understand its psychological impact. In a culture that often values 'reading the air' (kuuki o yomu), asking for a detailed explanation can sometimes be seen as a challenge or a sign of confusion. However, in modern Japanese business and education, it is increasingly viewed as a sign of diligence. By using kuwashiku, you are showing that you are paying attention and that the subject matter is important enough to warrant a deeper look. It is a word of focus, narrowing the lens from the wide-angle view of the world down to the microscopic details that make things work.

Using 詳しく (kuwashiku) correctly requires understanding its position within a Japanese sentence. As an adverb, its primary role is to modify verbs, and it typically appears before the verb it modifies. However, Japanese word order is flexible, so while it usually sits right before the verb, it can also appear earlier in the sentence for emphasis. The most common pattern is [Topic/Subject] + [Object] + kuwashiku + [Verb].

Standard Pattern

[Noun] を 詳しく [Verb] — To [Verb] [Noun] in detail.

Let's look at the variety of verbs that 詳しく can modify. The most frequent is setsumei suru (to explain). When you provide a 'detailed explanation,' you are breaking down complex ideas into manageable parts. Another common usage is with shiraberu (to investigate/check). If you are looking for a specific piece of information on the internet or in a book, you are investigating kuwashiku. This implies a level of scrutiny that goes beyond a cursory glance.

In the imperative or request form, 詳しく is incredibly useful for learners. If a teacher or a language partner explains something and you don't quite get it, you can say 'もう一度、詳しく教えてください' (Please tell me in detail once more). This is more specific than just saying 'I don't understand,' as it points to the need for more depth. In daily life, you might use it when ordering food (asking about ingredients in detail) or when visiting a doctor (explaining symptoms in detail).

Another nuance is the use of 詳しく with the verb naru (to become). When something 'becomes detailed,' it means the situation has evolved to a point where more information is available or required. For example, 'hanashi ga kuwashiku naru' (the story becomes detailed). However, it's more common to use the adjective form 'kuwashii' with 'naru' to mean 'to become knowledgeable' (e.g., Nihon ni kuwashiku naritai - I want to become knowledgeable about Japan). Be careful not to confuse the adverbial use (modifying the action of explaining) with the state of being knowledgeable.

Common Verb Pairings

1. 詳しく説明する (Explain in detail)
2. 詳しく教える (Teach/tell in detail)
3. 詳しく調べる (Investigate in detail)
4. 詳しく見る (Look at in detail)
5. 詳しく書く (Write in detail)

In formal documents, 詳しく often precedes verbs like kisai suru (to state/record) or houkoku suru (to report). In these contexts, it ensures that the recipient of the information is aware that the following data is comprehensive. Even in creative writing, an author might use kuwashiku to describe how a character is observing a scene, emphasizing their attention to detail. This highlights the word's ability to shift from a functional request for information to a descriptive tool for narrative depth.

You will encounter 詳しく (kuwashiku) in almost every corner of Japanese life. One of the most common places is in television news and variety shows. News anchors often say, 'Kono nyuusu ni tsuite, kuwashiku otsutae shimasu' (We will report on this news in detail). This phrase serves as a hook, promising the viewer that the upcoming segment will provide deeper insights than the initial headline. It creates a sense of anticipation for a thorough investigation.

News & Media

Used to transition from a headline to a full report. It signals the start of in-depth analysis.

In the world of customer service and retail, 詳しく is a staple. When a customer asks about a product's features, a staff member might say, 'Kuwashiku go-setsumei itashimasu' (I will explain it to you in detail). This polite (keigo) usage is essential for building trust. It assures the customer that the salesperson is knowledgeable and willing to spend time ensuring the customer understands the product. You'll also see it on websites, usually as a button or link that says '詳しくはこちら' (Click here for details), which is the Japanese equivalent of 'Learn More' or 'Read More'.

In educational settings, teachers use 詳しく to guide students. 'Kono bunpou o kuwashiku mite mimashou' (Let's look at this grammar in detail) is a phrase every Japanese language student has likely heard. It signals a shift from broad usage to specific rules and exceptions. In this context, the word acts as a pedagogical tool, focusing the students' attention on the intricacies of the language. Similarly, in textbooks, sections titled 'Kuwashiku shiro!' (Know more in detail!) often provide interesting trivia or deeper historical context about the lesson's topic.

Socially, 詳しく appears in gossip and storytelling. If someone starts a juicy story but skips the best parts, their friends will inevitably chime in with 'Motto kuwashiku!' (More details!). Here, it’s used to express curiosity and a desire for the 'inside scoop.' It’s a very natural way to keep a conversation going. In romantic contexts, someone might ask their partner to 'kuwashiku hanashite' about their day, showing that they care about even the small, seemingly insignificant moments of their partner's life.

Daily Life Examples

1. Asking for directions: 'Kuwashiku oshiete moraemasu ka?'
2. Reading a recipe: 'Kuwashiku kaite aru node wakari yasui.'
3. Tech support: 'Kuwashiku joukyou o oshiete kudasai.'

Finally, you’ll hear it in corporate Japan during project post-mortems or planning sessions. 'Kono mondai o kuwashiku bunseki suru hitsuyou ga aru' (There is a need to analyze this problem in detail). In a culture that prioritizes 'Kaizen' (continuous improvement), the ability to look at things kuwashiku is highly valued. It is the first step toward identifying root causes and implementing effective solutions. Whether it's a bug in a piece of software or a drop in sales, a 'kuwashii' investigation is always the starting point for a fix.

While 詳しく (kuwashiku) is a relatively straightforward adverb, learners often make a few key mistakes, primarily involving confusion with similar-sounding or similar-meaning words. The most common pitfall is the confusion between the adverb kuwashiku and the adjective kuwashii. Remember: use kuwashii to describe a noun (a detailed map = kuwashii chizu) and kuwashiku to describe an action (to explain in detail = kuwashiku setsumei suru).

Mistake 1: Adverb vs. Adjective

Incorrect: 詳しく説明をしました (Kuwashiku setsumei o shimashita) — While technically okay because 'setsumei o suru' is a verb phrase, learners often try to use 'kuwashiku' to modify a standalone noun like 'setsumei' (explanation).
Correct: 詳しい説明をしました (Kuwashii setsumei o shimashita — I gave a detailed explanation).

Another frequent mistake is confusing 詳しく with komakaku (細かく). While both can be translated as 'in detail,' they have different focuses. Kuwashiku is about the depth and thoroughness of information. Komakaku is about the smallness of parts or the meticulousness of an action. For example, if you are chopping onions into tiny pieces, you use komakaku. If you are explaining a complex political situation, you use kuwashiku. Using komakaku for an explanation can sometimes imply that you are being 'fussy' or focusing on trivial, unimportant details.

A third common error is misusing 詳しく with verbs of 'knowing.' Learners often say 'Kore o kuwashiku shitte iru' (I know this in detail). While not grammatically 'wrong,' it is much more natural to use the adjective form: 'Kore ni kuwashii' (I am knowledgeable about this). The adverbial form is better suited for the *process* of acquiring or sharing knowledge, rather than the state of possessing it. If you want to say you studied it thoroughly, say 'Kuwashiku shirabeta' (I investigated it in detail).

Finally, be careful with the word order. While Japanese is flexible, putting 詳しく too far away from the verb can sometimes make the sentence feel disjointed. For beginners, the safest bet is to place it immediately before the verb. Also, avoid overusing it. If you ask for 'detailed' information about every single thing, you might come across as overly demanding or unable to grasp the big picture. Use it when the details truly matter for understanding or decision-making.

Summary of Confusion

1. Kuwashiku (Information depth) vs. Komakaku (Physical smallness/fussy detail).
2. Kuwashiku (Adverb) vs. Kuwashii (Adjective).
3. Kuwashiku (Action) vs. Teinei ni (Attitude/Care).

To expand your Japanese vocabulary, it's helpful to know words that are similar to 詳しく (kuwashiku) but carry slightly different nuances. The most common formal alternative is shousai ni (詳細に). This is the 'adult' version of kuwashiku. You will see it in business emails, official reports, and academic papers. If kuwashiku is 'in detail,' shousai ni is 'specifically and minutely.' Use shousai ni when you want to sound more professional or when the context is highly formal.

Formal Alternative: 詳細に (shousai ni)

Usage: 'Details' in a professional context. Example: 'Shousai ni houkoku shite kudasai' (Please report in minute detail).

Another alternative is gutai-teki ni (具体的に), which means 'specifically' or 'concretely.' While 詳しく asks for more information in general, gutai-teki ni asks for specific examples or tangible facts. If someone says 'I want to improve the company,' you would ask 'Gutai-teki ni nani o shimasu ka?' (Specifically, what will you do?). It pushes for actionable details rather than just a long explanation. It's a great word for moving a conversation from abstract ideas to reality.

For a more casual or quick overview, you might use zatto (ざっと), which means 'roughly' or 'briefly.' This is the opposite of 詳しく. If you are in a hurry, you might say 'Zatto setsumei shite' (Give me a quick run-down). Understanding both kuwashiku and zatto allows you to control the speed and depth of the information flow according to your needs. Similarly, oomaka ni (大まかに) means 'broadly' or 'generally,' focusing on the big picture rather than the details.

Comparison Table

Word	Nuance	Register
詳しく	Thorough, deep info	Neutral
詳細に	Minute, precise info	Formal
具体的に	Concrete, specific	Neutral/Formal
細かく	Small parts, meticulous	Neutral

Lastly, consider the phrase tsubusa ni (具に). This is a literary and somewhat old-fashioned way to say 'in great detail' or 'minutely.' You'll mostly find this in novels or historical accounts. It implies that every single detail, no matter how small, was observed or recorded. While you won't use it in daily conversation, recognizing it will help you appreciate the richness of Japanese literature. For a learner, mastering 詳しく and shousai ni is the priority, as they cover 95% of 'in detail' situations.