説明

The Japanese word 説明 (setsumei) is a fundamental pillar of communication in Japan, serving as both a noun meaning 'explanation' and, when paired with the auxiliary verb suru, a verb meaning 'to explain.' At its core, it represents the logical process of breaking down a complex idea, a set of instructions, or a specific situation so that another person can grasp it fully. Unlike the English word 'tell' or 'show,' 説明 implies a structured delivery of information. It is the word you use when a teacher clarifies a grammar point, when a doctor describes a procedure, or when a colleague outlines a project plan. It is inherently objective and focuses on the transmission of clarity.

Formal Contexts

In business and academic settings, 説明 is the standard term for presentations, briefings, and reports. It carries a sense of responsibility; the person giving the explanation is expected to be accurate and thorough.

The word is composed of two kanji: 説 (setsu), which relates to theory, opinion, or preaching, and 明 (mei), which means bright, clear, or light. Together, they literally translate to 'making the theory clear.' This etymological root highlights the purpose of the word: to bring light to something that was previously obscure or misunderstood. In daily life, you will see this word everywhere—from the setsumeisho (instruction manual) that comes with your new toaster to the setsumeikai (information session) held by universities for prospective students.

Social Nuance

Japanese culture values clarity in professional interactions. Failing to provide a sufficient 説明 can be seen as a lack of sincerity or competence. Therefore, 'setsumei-busoku' (lack of explanation) is a common criticism in politics and corporate scandals.

Whether you are navigating a new city or learning a new skill, 説明 is the bridge between confusion and understanding. It is a versatile tool that adapts to the complexity of the subject matter, ranging from a simple sentence to a multi-volume technical manual. Understanding how to use this word correctly allows you to participate in the essential Japanese social ritual of 'sharing understanding' through clear, logical communication.

Grammatical Flexibility

Because it is a suru-verb, you can easily turn the noun into an action. 'Setsumei o suru' and 'setsumei suru' are both common, though the latter is more direct. It takes the particle 'o' for the object being explained and 'ni' for the person receiving the explanation.

Using 説明 (setsumei) effectively requires understanding its role as a transitive verb and a noun. When you want to explain something to someone, the basic structure is: [Person A] が [Person B] に [Topic] を 説明する. This clearly identifies the explainer, the recipient, and the subject matter. However, in Japanese, the subject or the recipient is often omitted if it is clear from the context. For example, in a classroom, a student might simply say 'Setsumei shite kudasai' (Please explain), where 'you' (the teacher) and 'to me' are implied.

The Noun Form

As a noun, 説明 can be modified by adjectives to describe the quality of the explanation. Common modifiers include 'kuwashii' (detailed), 'wakari-yasui' (easy to understand), 'fujubun-na' (insufficient), and 'teinei-na' (polite/thorough).

When using it as a verb, you have several choices for formality. In casual speech with friends, you might say 'setsumei shite' or 'setsumei suru ne.' In a polite setting, 'setsumei shimasu' is the standard. In very formal business situations, you might use humble or honorific forms like 'go-setsumei moushiagemasu' (I will explain to you) or 'go-setsumei kudasai' (Please explain, honorific). The prefix 'go-' (ご) is frequently added to 'setsumei' in professional contexts to show respect to the person you are talking to or the person providing the explanation.

Common Verb Pairings

'Setsumei o ukeru' (to receive an explanation) is a very common passive-like construction used when you are the one being briefed. 'Setsumei o tsuzukeru' means to continue an explanation that was interrupted.

In written Japanese, 説明 often appears in compound words. For instance, 'setsumei-bun' refers to explanatory writing or expository prose. In software, 'setsumei-ran' is the description field or column. Learning these compounds helps you recognize the word's function in various media. When you are writing, remember that 'setsumei' is a 'kango' (Sino-Japanese word), which gives it a slightly more formal and precise tone than native Japanese 'yamato kotoba' equivalents like 'tokiakashi' (clarification).

Particles to Watch

Use 'de' to indicate the means of explanation: 'zu de setsumei suru' (explain using a diagram). Use 'ni tsuite' to indicate the general topic: 'keikaku ni tsuite setsumei suru' (explain about the plan).

You will encounter 説明 (setsumei) in almost every facet of Japanese life, but its presence is most felt in environments where information transfer is critical. In the Japanese education system, the word is ubiquitous. Teachers use it to introduce new concepts, and students are often asked to 'setsumei shite' to prove they understand a topic. If you visit a Japanese school, you'll hear it in every subject, from math formulas to historical events. It is the gold standard for pedagogical clarity.

In the Workplace

The Japanese office is a hub of 説明. Before any major decision is made, there is usually a series of 'setsumeikai' (briefings) to ensure all stakeholders are on the same page. When a new product is launched, the 'shouhin setsumei' (product explanation) is a vital part of the sales process. You'll hear managers say, 'Kore, setsumei dekiru?' (Can you explain this?), which is a test of a subordinate's grasp of the facts.

Public announcements and customer service are other areas where 説明 is constantly heard. On trains, if there is a delay, the conductor will provide a 'setsumei' regarding the cause and the estimated time of resumption. In shops, if you are looking at a complex electronic device, a staff member will approach you and ask, 'Setsumei shimashou ka?' (Shall I explain?). This reflects the Japanese emphasis on 'omotenashi' (hospitality) through providing helpful information.

News and Media

News anchors frequently use 説明 when introducing a segment that clarifies a complex news story. They might say, 'Kaisetsu-in no [Name]-san ni setsumei shite moraimasu' (We will have our commentator, Mr./Ms. [Name], explain it for us). In this context, it often overlaps with 'kaisetsu' (commentary/analysis).

In the legal and political world, 'setsumei sekinin' (accountability, literally 'explanation responsibility') is a major buzzword. It refers to the obligation of officials to explain their actions and decisions to the public. When a politician is under fire, the media will relentlessly demand 'setsumei.' This highlights the word's connection to transparency and ethics in Japanese society.

Medical Settings

In Japanese hospitals, the concept of 'Informed Consent' is often translated or described as 'setsumei to doui' (explanation and agreement). Doctors are legally and ethically required to provide a thorough 説明 of risks and benefits before a patient undergoes surgery.

One of the most common mistakes English speakers make with 説明 (setsumei) is confusing it with the verb oshieru (to teach/tell). While they both involve giving information, 説明 is about clarifying a 'how' or 'why' through logic, whereas oshieru is about transferring knowledge or a skill. For example, if you ask someone for their phone number, you use oshieru, not setsumei. You don't 'explain' a phone number; you 'tell' it. Using setsumei in that context would sound very strange, as if you were going to explain the mathematical theory behind the digits.

Confusing with 'Iu' (Say)

Another error is using 'iu' (to say) when a more descriptive 'setsumei suru' is needed. If you are describing a complex situation, 'iu' is too simple. 'Setsumei suru' signals to the listener that they should prepare for a logical sequence of facts.

A subtle mistake involves the particle usage. Learners often forget that the person receiving the explanation takes the particle 'ni' (to), not 'o' (object). If you say 'Tanaka-san o setsumei suru,' you are saying 'I will explain Mr. Tanaka' (perhaps explaining who he is or his character), rather than 'I will explain [something] TO Mr. Tanaka.' Always keep the recipient marked with 'ni.'

Overusing 'Setsumei'

Sometimes learners use 説明 for simple statements. If you are just stating a fact like 'It is raining,' that is not a 説明. It only becomes a 説明 if you are detailing the meteorological causes of the rain or why the rain is causing a delay.

Finally, be careful with the word 'setsumei-busoku' (insufficient explanation). While it is a useful word, using it directly to someone's face can be quite confrontational, as it implies they have failed in their duty to be clear. In a polite setting, it is better to say 'moushiwake arimasen ga, yoku wakarimasen deshita' (I'm sorry, but I didn't quite understand) rather than accusing them of 'setsumei-busoku.'

Transitive vs. Intransitive

Remember that 説明する is transitive. It needs an object (marked with 'o') or a topic (marked with 'ni tsuite'). You can't just 'setsumei' into the void; you must explain *something*.

While 説明 (setsumei) is the most versatile word for explaining, Japanese has several synonyms that are used in more specific contexts. Understanding these nuances will make your Japanese sound much more natural and precise. The most common alternative is 解説 (kaisetsu). While setsumei is a general explanation of facts, kaisetsu implies a deeper analysis or commentary, often by an expert. You'll see kaisetsu used by sports commentators or literary critics.

Comparison: 説明 vs. 解説

説明 (Setsumei): General, factual, clarifying 'how' or 'what'. (e.g., explaining how to use a microwave).
解説 (Kaisetsu): Expert commentary, analysis, clarifying 'why' or the deeper meaning. (e.g., a political analyst explaining the impact of a new law).

Another related word is 紹介 (shoukai), which means 'introduction.' You use shoukai when you are presenting something new to someone for the first time, like a person, a book, or a place. If you 'shoukai' a book, you tell someone it exists and why it's good. If you 'setsumei' a book, you are likely explaining its plot or its complex themes. Then there is 案内 (annai), which means 'guidance' or 'showing around.' You 'annai' someone through a building or a city, physically leading them and explaining things as you go.

Comparison: 説明 vs. 釈明

説明 (Setsumei): Neutral clarification of facts.
釈明 (Shakumei): Clarification given to clear up a misunderstanding or to defend oneself against criticism. Often used in legal or formal apologies.

For technical or highly detailed clarifications, you might encounter 詳説 (shousetsu), which literally means 'detailed explanation.' This is common in academic papers or technical manuals. In contrast, 略説 (ryakusetsu) means a 'brief explanation' or 'summary.' Choosing between these shows your level of detail. Finally, 教示 (kyouji) is a very formal way of saying 'teaching' or 'instructing,' often used in written business requests when asking someone for their expertise: 'go-kyouji kudasai' (please instruct/explain to me).

Summary of Nuances

Use setsumei for general clarity, kaisetsu for expert analysis, shoukai for introductions, annai for tours, and shakumei for defending your actions.