添付する

The Japanese verb 添付する (てんぷする - tenpu suru) is a cornerstone of modern Japanese communication, particularly in professional, academic, and administrative contexts. At its most fundamental level, it means 'to attach' or 'to append.' While the English word 'attach' can be used for physical objects (like attaching a trailer to a car), 添付する is predominantly reserved for documents, files, and digital media that accompany a primary message or document. In the digital age, this is the standard term used for 'attaching a file' to an email. Understanding this word requires looking at its two constituent kanji: 添 (ten), which means to accompany, add, or annex, and 付 (fu), which means to adhere, attach, or stick. Together, they create a formal nuance of adding something supplementary to a main body of work. Unlike the more casual 付け加える (tsukekuwaeru), which implies adding something extra or an afterthought, 添付する suggests a structured relationship where the attached item is an integral part of the submission or communication.

Core Meaning

The act of appending a supplementary document or digital file to a primary communication, such as an email, application form, or report.

Historically, before the ubiquity of the internet, 添付する was used for physical paperwork—stapling a receipt to an expense report or pinning a photograph to a profile. However, in contemporary Japanese, if you are putting something inside an envelope with a letter, you are more likely to use the word 同封する (doufuu suru - to enclose). 添付する has evolved to be the king of the digital workspace. When you click the paperclip icon in Gmail or Outlook while using the Japanese interface, the label you see is 添付. It carries a certain level of formality; it is a 'kango' (Sino-Japanese word), which naturally sounds more professional and objective than 'wago' (native Japanese words). This makes it the default choice for business emails. If you were to use a simpler verb like つける (tsukeru), it might sound slightly too casual or vague in a corporate setting. Professionals use 添付する to ensure there is no ambiguity about the action being performed.

When should you use it? Use it whenever there is a clear 'main' object and a 'secondary' object being joined. In an office, you will hear it constantly: 'Did you attach the invoice?' (請求書を添付しましたか？), 'Please attach your resume.' (履歴書を添付してください。), or 'The attachment is corrupted.' (添付ファイルが壊れています。). It is also used in legal and technical writing. For instance, a contract might have 'Attached Table 1' (添付表1). Interestingly, while it is a verb, it is very frequently seen in its noun form, 添付 (tenpu), often followed by another noun like ファイル (fairu - file) or 書類 (shorui - document). This word is essential for anyone operating at a CEFR B1 level or higher because it marks the transition from basic daily conversation to functional, professional Japanese. It is not just about the action of clicking a button; it is about the expectation of professional etiquette. Forgetting to 添付 a file after saying you would is a common 'business mistake' (tsuui-jika) that leads to the follow-up email: 'I forgot the attachment' (添付を忘れました).

Furthermore, the usage of 添付する extends to mobile applications and social media when referring to sending media. If you are 'attaching' a photo to a tweet or a LINE message, 添付 is the technically correct term, though in casual speech, people might just say 載せる (noseru - to put/post) or 送る (okuru - to send). However, in any situation where the file is an 'attachment' to a text-based message, 添付する remains the gold standard. It is a productive verb, meaning it is a noun (添付) that becomes a verb by adding する (suru). This structure is common for technical terms in Japanese. Learning 添付する also helps you recognize related words like 添える (soeru), a beautiful native Japanese verb meaning to garnish or add a touch of something, often used in cooking or when adding a small gift or a note to a gesture. While 添付する is functional and cold, 添える is warm and aesthetic. Distinguishing these two is a mark of a truly advanced speaker.

Usage Contexts

Business emails (files), Job applications (resumes), Government forms (identification copies), Academic submissions (reference lists), and Technical manuals (diagrams).

Finally, let's look at the nuance of the kanji once more. 添 (Ten) appears in words like 添削 (tensaku - correction/editing) where you 'add' marks to a paper. 付 (Fu) appears in words like 付近 (fukin - vicinity) or 受付 (uketsuke - reception). The combination implies that the added item is now in the 'vicinity' or 'accompanying' the main item so closely that they are treated as one unit. This is why 添付 is not used for things that are just 'near' each other, but for things that are logically or physically bound together for the purpose of a transaction or communication. If you are learning Japanese for work, this is easily one of the top 50 most important verbs to master for daily office survival.

Using 添付する correctly involves understanding its grammatical role as a Suru-verb and its typical sentence patterns. Because it is a transitive verb, it almost always takes a direct object marked by the particle を (o). The most common structure is [Object] を [Medium] に 添付する. For example: ファイルをメールに添付する (Attach a file to an email). The 'medium' (the email, the form, the report) is marked with に (ni), indicating the destination or the target of the attachment. This pattern is very stable and rarely changes across different levels of formality.

Standard Pattern

[Noun A: The thing being attached] + を + [Noun B: The destination] + に + 添付する

In business Japanese, the verb is frequently conjugated into polite or humble forms. You will rarely hear a subordinate say 'tenpu suru' to a boss; instead, they will say 添付いたします (tenpu itashimasu). This humble form shows respect by lowering the speaker's action. Conversely, if a boss asks a subordinate to attach something, they might say 添付してください (tenpu shite kudasai) or more formally 添付願います (tenpu negaimasu). Another common variation is using the noun form 添付 (tenpu) as a modifier. For example, 添付ファイル (tenpu fairu) means 'attached file.' You can say 添付ファイルをご確認ください (Please check the attached file).

Another important aspect of using 添付する is the passive voice, 添付される (tenpu sareru). This is often used in instructions or system messages. For example, 'The photo will be attached automatically' would be 写真は自動的に添付されます (Shashin wa jidouteki ni tenpu saremasu). In formal documents, you might also see the potential form 添付できる (tenpu dekiru), meaning 'can be attached.' For instance, 'Only PDF files can be attached' is PDFファイルのみ添付できます (PDF fairu nomi tenpu dekimasu). Understanding these conjugations allows you to navigate technical interfaces and professional instructions with ease.

Let's look at some more complex usage. In legal or academic writing, 添付する might be used in the 'te-form' to connect multiple actions. 資料を添付して、明日までに提出してください (Attach the materials and submit them by tomorrow). Here, the attachment is a prerequisite for the submission. You might also encounter the word in the context of 'attachment lists' (添付書類一覧 - tenpu shorui ichiran). This is common in government applications where you must check off a list of required documents. In these cases, 添付 functions as a 'suru' verb that has been nominalized to describe the state of the documents.

Common Objects of 添付する

PDF, 請求書 (Invoice), 履歴書 (Resume), 写真 (Photo), 議事録 (Minutes), 領収書 (Receipt), 地図 (Map).

The phrase 添付し忘れる (tenpu-shi-wasureru) is a very useful compound verb for learners. It combines the stem of 添付する with the verb 忘れる (to forget). This is a common occurrence in the fast-paced world of business, and knowing how to apologize for it correctly using this specific verb will make you sound much more natural. You would say: 申し訳ございません。ファイルを添付し忘れました。再送いたします。 (I am very sorry. I forgot to attach the file. I am resending it now.) This level of specificity in your verb choice shows that you understand the nuances of office communication in Japan.

If you work in a Japanese office, you will hear 添付する or its noun form 添付 dozens of times a day. It is the lifeblood of the digital workflow. In a typical morning meeting, a colleague might say, 「今日のスケジュールを添付で送りました」 (I sent today's schedule as an attachment). Here, 'tenpu de' functions like 'via attachment' or 'as an attachment.' It is much more common to hear this than the longer phrase 'tenpu shite okurimashita.' The word has become so ubiquitous that it is often used as a shorthand for the file itself.

Office Setting

Heard during meetings, email exchanges, and software tutorials. It is the standard term for adding any digital asset to a communication.

Another place you will frequently encounter this word is in the user interface (UI) of Japanese software. Whether you are using a Japanese version of Microsoft Word, a banking app, or a government portal for filing taxes (like e-Tax), the button to upload a supporting document will almost certainly be labeled 添付 or ファイルを添付する. In this context, it is a technical instruction. If you are applying for a visa or a resident card, the instructions will repeatedly use 添付書類 (tenpu shorui) to refer to the 'accompanying documents' like bank statements or photos. This is a very formal context where precision is required.

In the education sector, teachers and professors use this word when assigning homework via platforms like Google Classroom or Moodle. A teacher might tell their students, 「レポートはPDF形式で添付して提出してください」 (Please attach and submit your report in PDF format). For students, knowing this word is vital for following submission guidelines correctly. You might also see it in academic papers or textbooks where a diagram or a data sheet is 'attached' at the end of a chapter as an 付録 (furoku - appendix), though the action of adding it there is still described as 添付.

You will also hear 添付する in IT support and customer service. If you call a help desk because you cannot upload a file, the technician will ask, 「どのようなファイルを添付しようとしていますか？」 (What kind of file are you trying to attach?). In this scenario, the word is used to diagnose technical issues. It is also found in the 'Terms of Service' or 'Privacy Policy' of websites, often regarding how 'attached data' is handled and stored. This demonstrates that the word spans from the extremely practical (sending a photo to a friend) to the legally binding (submitting evidence in court).

Digital UI Terms

添付ボタン (Attach button), 添付漏れ (Missing attachment), 添付制限 (Attachment limit/size limit).

Finally, in more casual settings like social media, you might see people using it when sharing a screenshot or a link to justify their point. 「証拠の画像を添付します」 (I'm attaching the image as evidence). While 'tenpu' sounds a bit stiff for a casual chat with friends, it is used on platforms like Twitter (X) when people want to sound authoritative or clear. It is a word that bridges the gap between the physical world of paper and the digital world of bits, remaining a constant in the Japanese lexicon of 'joining things together.'

One of the most frequent mistakes English speakers make with 添付する is confusing it with other verbs that mean 'to attach' or 'to put on' in English. The primary culprit is 貼る (haru). While 'haru' means to stick or paste (like using glue or tape), it is used for physical surfaces. You haru a stamp on an envelope, but you tenpu suru a file to an email. If you say 'fairu o haru,' a Japanese person might imagine you physically taping a piece of paper to your computer screen! Always remember: 添付 is for 'appending' data or documents, while 貼る is for 'sticking' things to surfaces.

Confusion: 添付 vs 貼る

Use 添付 (tenpu) for files/documents in a system. Use 貼る (haru) for physical sticking or digital 'pasting' (Ctrl+V) of text/links.

Another common error is the misuse of 同封する (doufuu suru). As mentioned before, 'doufuu' specifically means 'to put inside the same envelope.' If you are sending a physical letter and you include a check, you are doufuu-ing the check. If you use 添付する for a physical letter, it sounds like you are stapling the check to the outside of the envelope or perhaps to the letter itself. While 添付 is technically possible for physical documents, it sounds much more like a formal 'appendix' rather than just 'putting it in the box.' In the digital world, however, 添付 has completely replaced 同封.

Learners also struggle with the transitive nature of the verb. Some try to say 「メールが添付しました」 (The email attached), which is incorrect. The email doesn't perform the action; the person does. It must be 「メールにファイルを添付しました」 (I attached a file to the email). If you want to say 'a file is attached,' you must use the passive voice 「ファイルが添付されています」 (A file is attached). Forgetting the を (o) particle for the file or the に (ni) particle for the destination is a common grammatical slip-up that can make the sentence confusing.

Finally, there is the nuance of 付録 (furoku) vs 添付 (tenpu). Some learners use 'tenpu' to refer to the free gift that comes with a magazine. In Japanese, that gift is a 'furoku.' While the gift is 'attached' to the magazine in a general sense, the specific noun for a supplement or bonus is 'furoku.' Using 'tenpu' in that context sounds like a technical error. Similarly, don't confuse 添付 with 付属 (fuzoku). 'Fuzoku' means 'attached' in the sense of being an accessory or a subordinate part of a system (like a 'university-affiliated high school' - fuzoku koukou). 添付 is an action of adding, while 付属 is a state of belonging.

Quick Comparison

1. 添付: Adding a file to a message. 2. 貼る: Sticking a stamp or pasting a link. 3. 同封: Putting something in an envelope. 4. 付属: An accessory or affiliation.

Avoiding these mistakes will help you communicate with much greater precision. In Japanese culture, where clarity and politeness are paramount, using the specific verb for the specific action is a sign of respect for the language and the recipient. When in doubt, if it involves a digital file and an email, 添付する is almost always the right choice.

While 添付する is the most common term for 'to attach' in a professional context, there are several other words that cover similar ground but with different nuances. Understanding these alternatives will help you choose the most natural expression for your specific situation. The most direct relative is 添える (soeru). As a native Japanese 'wago' verb, it sounds softer and more personal. It is often used when adding something as a courtesy or a 'nice-to-have' rather than a required document. For example, adding a small note to a gift is 'tegami o soeru.' In business, you might 'soeru' a few words of explanation to a report.

Comparison: 添付する vs 添える

添付する: Formal, technical, used for required files/documents.
添える: Softer, aesthetic, used for adding a 'touch' or a courtesy.

Another formal alternative is 付帯する (futai suru). This word is much more technical and is often used in legal or insurance contexts to mean 'incidental' or 'ancillary.' For example, 'incidental expenses' are 付帯費用 (futai hiyou). You wouldn't use this to talk about an email attachment; it's used for things that naturally or legally come along with a primary item, like a warranty that 'attaches' to a product purchase. Similarly, 付随する (fuzui suru) means 'to accompany' or 'to be consequent to,' often used for abstract things like 'responsibilities that accompany a promotion.'

For physical objects, 付ける (tsukeru) is the most versatile verb. It means 'to attach, apply, or put on.' You can use it for everything from putting on a name tag to adding sugar to coffee. Because it is so broad, it is often replaced by more specific terms like 添付する in professional writing. However, in spoken Japanese, if you are telling someone to 'put a cover' on a book, you would use カバーを付ける (kabaa o tsukeru). Another related word is 結合する (kegou suru), which means 'to combine' or 'to join' at a structural level, like joining two PDF files into one. This is about merging, whereas 添付 is about appending.

In the realm of computer science and IT, you might also see アタッチ (atatchi), the katakana version of 'attach.' This is used specifically in technical contexts, like 'attaching a debugger to a process' or 'attaching a volume to a server.' For everyday email use, however, 添付 remains the standard. Another katakana word is アップロード (appuroodo - upload). While 添付 refers to the relationship between the file and the message, upload refers to the movement of the file from a local computer to a server. You 'upload' a file to a cloud drive, but you 'attach' it to an email.

Summary Table

- 添付: Files to emails/forms (Digital/Formal).
- 同封: Items inside envelopes (Physical).
- 貼る: Sticking to surfaces/pasting links.
- 添える: Adding a touch/courtesy (Soft/Wago).
- 付ける: General 'put on' (Broad/Common).

By mastering these distinctions, you can move beyond simple 'dictionary equivalents' and start using Japanese with the precision of a native speaker. Choosing 添付する when sending a report, 同封する when mailing a letter, and 添える when adding a polite note shows a deep understanding of the social and functional contexts of the language.