Imagine this: you meet someone at a language exchange meetup in Tokyo, go on a few coffee dates, and things are going well. You text your Japanese friend in excitement and say, 私たち、デートしています！ — “We’re dating!” Your friend smiles and congratulates you on a nice afternoon out. Then you mention this person again a week later, and again the week after, and your friend starts to look confused. “Wait — are you two actually together?”
This is the classic English-speaker trap. In English, “dating” covers a wide range: it can mean going on a single date, casually seeing someone, or being in a committed relationship. Japanese is far more precise. デートする describes the action of going on a date. 付き合う（つきあう）describes the status of being in an official couple. These are different things, and mixing them up causes real confusion.
This guide maps the full Japanese relationship timeline — from that first date all the way to marriage registration — so you know exactly which word to use at each stage. You will also learn when 交際する（こうさいする）sounds more appropriate than 付き合う, what 婚約する（こんやくする）means and how it differs from 結婚する（けっこんする）, and why 入籍する（にゅうせきする）is not quite the same thing as “getting married.”
| Word | Reading | Core Meaning | Stage | Register |
|---|---|---|---|---|
| デートする | でーとする | To go on a date (the action) | Single date / early stage | Casual / everyday |
| 付き合う | つきあう | To be in a committed relationship; to be a couple | Official couple status | Casual / everyday spoken |
| 交際する | こうさいする | To be in a relationship (formal) | Same as 付き合う, more formal | Formal / written / news |
| 婚約する | こんやくする | To get engaged | Pre-marriage; engagement | Neutral / slightly formal |
| 結婚する | けっこんする | To get married (general) | Marriage (ceremony + social) | Neutral / everyday |
| 入籍する | にゅうせきする | To register the marriage legally | Legal marriage registration | Slightly formal / administrative |
What Does デートする Mean?
デートする as going on a date — the action, not the status
デート comes from the English word “date,” and デートする means to go on a date — a specific outing with a romantic interest. The key word here is action. デートする describes something you do, like going to a restaurant, seeing a movie, or taking a walk together. It does not describe what you are to each other.
This is why デートしています can be misleading as a translation of “we’re dating.” デートしています literally means “we are going on a date right now” — or at most, “we go on dates” — but it says nothing about whether you are officially a couple. You could go on twenty dates and still use デートする to describe each one, even if you have not had the official 告白（こくはく）confession moment yet.
初デート — your first date
初デート（はつデート）is the natural phrase for “first date.” It is a widely used compound and the most common way to talk about an early-stage romantic outing.
初デートはどこに行きましたか？
Where did you go on your first date?
初デートで映画を観た。
We watched a movie on our first date.
デートに行く vs デートする
Both phrases are natural and nearly interchangeable in casual speech. デートに行く（でーとに いく）emphasizes going somewhere for a date, while デートする focuses on doing the dating activity. You will hear both frequently.
週末にデートに行く予定です。
I plan to go on a date this weekend.
昨日、彼女とデートした。
I went on a date with her yesterday.
デートする vs 遊ぶ — romantic date vs hanging out as friends
遊ぶ（あそぶ）means “to hang out” or “to play” — and in the context of adults, it commonly means going out and having fun together. The important distinction: 遊ぶ is neutral about romantic intent, while デートする implies at least some romantic framing.
If you ask someone 今度、一緒に遊ぼう！（”Let’s hang out sometime!”）, it reads as friendly. If you say 今度、デートしよう！（”Let’s go on a date!”）, it reads as romantic. This distinction matters when you are still figuring out whether something is a “date” or just friends spending time together — a very real situation in Japanese social life.
Why デートしている ≠ “we’re in a relationship”
To summarize the core point: デートしている describes repeated dating activity. It does not mean you are officially a couple. In Japanese, becoming an official couple requires a distinct step — 告白 (a verbal confession of feelings) followed by mutual agreement. Until that moment, two people can go on many dates and still not be “together” in the Japanese sense.
If you want to say “we are in a relationship,” the correct phrase is 付き合っています — not デートしています. This is the single most important distinction in this entire article.
Example sentences for デートする
彼とデートした。楽しかった！
I went on a date with him. It was fun!
今度、渋谷でデートしない？
Want to go on a date in Shibuya sometime?
もう三回デートしたけど、まだ付き合っていない。
We’ve been on three dates already, but we’re not officially together yet.
What Does 付き合う Mean?
付き合う as “to be in a relationship” / “to be a couple”
付き合う（つきあう）is the core word for being in a romantic relationship in everyday Japanese. When two people are officially a couple — when they have both agreed to be together — they are 付き合っている. This is the status word that “we’re dating” in English usually translates to.
Grammatically, 付き合う is a Group 1 (godan) verb. The present progressive form 付き合っている（つきあっている）is used to describe an ongoing relationship status, exactly like the English “we are together.”
付き合っています — “We are together”
付き合っています is the polite present form that describes your current relationship status. It translates naturally as “we are together,” “we are dating” (in the committed sense), or “we are a couple.”
田中さんと付き合っています。
I’m in a relationship with Tanaka-san. / Tanaka-san and I are together.
あの二人、付き合っているらしいよ。
Apparently those two are going out together.
YukaSo when someone asks me 彼氏いるの？ and I want to say “yes, we’re together,” I should say 付き合っています — not デートしています?
ReiExactly right. 付き合っています means you are officially a couple — it’s your relationship status. デートしています just means you went on a date or go on dates. They’re very different! If you said デートしています in response to 彼氏いるの？, the person would probably think you’re describing what you did last weekend, not that you have a boyfriend.
付き合ってください — “Please go out with me” (the confession: 告白)
In Japanese dating culture, becoming a couple is not a gradual assumption — it usually requires an explicit moment called 告白（こくはく）, where one person verbally confesses their feelings and asks the other to be in a relationship. The classic phrase used in this moment is:
付き合ってください。
Please go out with me. / Will you be my girlfriend/boyfriend?
好きです。付き合ってください。
I like you. Please go out with me.
This is a cultural point that surprises many English speakers. In English, couples often slide into a relationship without a formal moment. In Japan, 告白 is the standard way to make things official. Until someone says 付き合ってください and the other person agrees, the two people are generally not considered to be in a couple — even if they have been going on dates for weeks.
付き合って1年になります — anniversary language
Once you are in a relationship, 付き合う is also used when talking about how long you have been together.
付き合って1年になります。
It’s been one year since we started going out.
付き合って半年が経ちました。
Six months have passed since we got together.
Non-romantic uses of 付き合う
付き合う has an important non-romantic meaning that trips up learners: it can mean to keep someone company or to go along with something. Context makes the meaning clear.
買い物に付き合ってくれない？
Will you come shopping with me? / Will you keep me company while I shop?
彼の冗談に付き合うのが大変だ。
It’s exhausting going along with his jokes.
飲み会に付き合ってください。
Please join us (come along) for drinks.
In these non-romantic uses, 付き合う means accompanying someone or playing along. There is no risk of confusion in context, but it is good to know that this word has a life outside the romance department.
Example sentences for 付き合う (romantic)
私たちは付き合っています。
We are in a relationship. / We are a couple.
彼女と付き合い始めたばかりです。
I just started going out with her.
三年間付き合った後で結婚しました。
We got married after dating for three years.
What Does 交際する Mean?
交際する as formal “to be in a relationship”
交際する（こうさいする）means essentially the same thing as 付き合う in terms of relationship content — two people are in a romantic relationship — but the register is significantly more formal. You would not typically say 交際している to your close friends in casual conversation. Instead, you would see and hear it in news articles, formal announcements, official contexts, and written Japanese.
交際相手 — romantic partner (formal term)
交際相手（こうさいあいて）is the formal word for “romantic partner” or “the person you are in a relationship with.” You will encounter this in official paperwork, surveys, or formal writing where using 彼氏 or 彼女 would feel too casual.
交際相手はいますか？
Do you have a romantic partner? (formal / survey context)
交際期間 — the period of dating / relationship duration
交際期間（こうさいきかん）means “the duration of the relationship” — how long two people have been together. This term is particularly common in marriage-related contexts, such as 婚活（こんかつ）events or formal introductions（お見合い）.
交際期間はどのくらいですか？
How long have you been together? (formal context)
交際する in celebrity news
One of the most common places you will encounter 交際する is in celebrity relationship announcements in Japanese entertainment news. When a celebrity couple goes public, the headline almost always uses 交際, not 付き合う.
〇〇と△△が交際していることを認めた。
〇〇 and △△ have confirmed that they are in a relationship.
二人は現在交際中と報じられた。
The two were reported to currently be in a relationship.
付き合う vs 交際する — spoken vs written/formal
The practical distinction is simple:
| 付き合う | 交際する | |
|---|---|---|
| Register | Casual / everyday spoken | Formal / written / official |
| Where you hear it | Friends, conversation, texting | News, surveys, formal paperwork |
| Sounds natural when | Telling a friend about your partner | Describing a celebrity relationship or answering formal questions |
| Sounds odd when | Writing a formal news article | Texting a friend casually |
| Meaning | To be in a (committed) relationship | To be in a relationship (same meaning, different register) |
When 交際する sounds too formal for daily speech
If you use 交際する in casual speech with friends, it can sound stiff or overly formal — a bit like saying “we are currently engaged in a romantic courtship” instead of “we’re going out.” Stick to 付き合う for everyday conversation and save 交際する for formal writing, news reading, or official forms.
What Does 婚約する Mean?
婚約する as getting engaged
婚約する（こんやくする）means to get engaged — the stage where two people have agreed to marry but have not yet legally registered the marriage. The noun form is 婚約（こんやく）, “engagement.”
先月、婚約しました。
We got engaged last month.
二人は長い交際期間を経て婚約した。
The two got engaged after a long relationship.
婚約者 — fiancé / fiancée
婚約者（こんやくしゃ）is the word for “fiancé” or “fiancée.” Unlike English, which has gendered versions (fiancé for men, fiancée for women), 婚約者 covers both — just like most Japanese vocabulary does.
こちらが私の婚約者です。
This is my fiancé / fiancée.
婚約指輪 — engagement ring
婚約指輪（こんやくゆびわ）is the “engagement ring.” This is a completely standard and widely understood term — giving a 婚約指輪 is a common part of the Japanese proposal tradition.
プロポーズのときに婚約指輪を贈った。
I gave an engagement ring when I proposed.
プロポーズする — to propose
プロポーズする（ぷろぽーずする）means “to propose marriage” — the act of asking someone to marry you. This loanword is fully naturalized in Japanese and is the standard term.
彼女にプロポーズした。
I proposed to her.
プロポーズされて、すごく嬉しかった。
I was so happy when he/she proposed to me.
婚約 vs 結婚 — engagement vs marriage
婚約（こんやく）is engagement — the promise to marry. 結婚（けっこん）is the marriage itself. These are distinct stages, and mixing them up can cause awkward misunderstandings.
婚約したからといって、すぐに結婚するわけではない。
Just because we got engaged doesn’t mean we’re getting married right away.
結婚する and 入籍する
結婚する — to get married (general)
結婚する（けっこんする）is the general, everyday word for “to get married.” It covers the social, ceremonial, and emotional concept of marriage and is the word you would use in almost all everyday conversations about marriage.
来年、結婚します。
We’re getting married next year.
彼女と結婚したい。
I want to marry her.
入籍する — to register the marriage legally
入籍する（にゅうせきする）literally means “to enter the family register” — it refers specifically to the legal administrative act of submitting a marriage notification form to the municipal office (市役所 or 区役所). In Japan, marriage becomes legally recognized when this form is submitted, not at the wedding ceremony.
Why 結婚 ≠ 入籍
This distinction surprises many English speakers, because in English “getting married” tends to mean both the ceremony and the legal registration in one event. In Japan, these can be separated:
• A couple can have a wedding ceremony (結婚式, けっこんしき) without having filed the paperwork yet — and would still be socially “married” in most people’s eyes.
• A couple can file the legal paperwork (入籍) without holding any ceremony — and would be legally married with no public celebration.
Some couples also choose to 入籍 on a meaningful date (like a birthday or anniversary) separately from their 結婚式. The paperwork date and the party date do not have to match.
入籍しました vs 結婚しました in announcements
Both phrases are used to announce marriage, with slightly different nuance:
結婚しました — “We got married” (general; used in most social and ceremonial contexts)
入籍しました — “We registered our marriage” (slightly more specific; implies the legal paperwork was completed; common on social media)
In practice, 入籍しました has become popular on social media as a way to announce the legal registration moment — sometimes before or separate from the ceremony. Both are acceptable, and you will hear both regularly.
YukaSo someone could post 入籍しました on Instagram even before the actual wedding party?
ReiExactly! It’s quite common in Japan. The legal registration and the wedding celebration are separate events, and people often announce each one separately. 入籍しました means the paperwork is done — they are legally married. The 結婚式 (wedding ceremony or reception party) might happen months later, or not at all for some couples.
付き合う vs デートする
Action (one date) vs status (ongoing relationship)
The fundamental distinction is between an action and a status:
• デートする = an action. Something you do. You can デートする with anyone you go on a date with — even on a first date with someone you just met, even if neither of you knows where things are going.
• 付き合う = a status. Something you are. You 付き合っている with the person who is your official partner — after both people have agreed to be in the relationship.
デートしたけど付き合っていない — went on dates but not officially together
This sentence perfectly captures the gap between the two words:
何回かデートしたけど、まだ付き合っていない。
We’ve been on several dates, but we’re not officially together yet.
This is a completely natural Japanese sentence and describes a situation many people find themselves in — the “are we a couple or not?” phase between early dates and the 告白 moment.
付き合ってからデートする — going on dates as a couple
Once you are 付き合っている, you still go on デート — but now you are doing so as an official couple. The word デートする does not go away after the relationship starts; it just takes on a different context.
付き合ってからも毎週デートしている。
Even after we started going out, we go on a date every week.
The “we’re dating” mistranslation problem
To put it plainly:
| English | Intended meaning | Correct Japanese | Wrong Japanese |
|---|---|---|---|
| “We’re dating” (= we’re a couple) | Relationship status | 付き合っています ✓ | デートしています ✗ |
| “We went on a date” | One specific outing | デートしました ✓ | 付き合いました ✗ |
| “We go on dates” (= we are a couple who dates) | Couple activity | 付き合っていてよくデートします ✓ | デートしています (ambiguous) |
付き合う vs 交際する
Casual spoken vs formal/written
As covered in the 交際する section, these two words describe the same relationship status but at different registers. In everyday spoken Japanese, always default to 付き合う. Use 交際する when you are reading or writing formal content — news articles, official forms, or formal descriptions of someone’s relationship history.
When to switch from 付き合う to 交際する
A practical rule of thumb: if you would say “boyfriend/girlfriend” to a friend, use 付き合う. If you would say “the person in question is currently in a relationship with” in an official context, use 交際する. Think of 交際する as the word that would appear in a news ticker, and 付き合う as the word that would appear in a text message.
Related Relationship Status Words
告白する — to confess feelings (the critical step before 付き合う)
告白する（こくはくする）means “to confess one’s feelings” — specifically, to tell someone you like them and ask them to be your partner. This is culturally a significant moment in Japanese relationship culture. Until 告白 happens, two people who go on dates are typically not considered a couple. The 告白 is the bridge between デートしている and 付き合っている.
勇気を出して告白した。
I summoned the courage and confessed my feelings.
告白したら、付き合ってもらえた。
After I confessed, she agreed to go out with me.
恋人 / 彼氏 / 彼女 — what to call your partner once you 付き合う
Once you 付き合っている, you have a 恋人（こいびと）— a romantic partner. In casual use, 彼氏（かれし）means “boyfriend” and 彼女（かのじょ）means “girlfriend.” 恋人 is gender-neutral and slightly more literary or formal.
彼氏に会いに行く。
I’m going to meet my boyfriend.
恋人と旅行するのが夢です。
My dream is to travel with my partner.
パートナー / 配偶者
パートナー（ぱーとなー）is increasingly used as a gender-neutral term for a romantic partner or spouse, especially in LGBTQ+ contexts or among younger generations who prefer not to use gendered terms. 配偶者（はいぐうしゃ）is the formal, legal term for “spouse” and appears on official documents.
独身 — single
独身（どくしん）means “single” or “unmarried” — not in a relationship or not married. It appears frequently on forms and surveys and in casual conversation.
まだ独身です。
I’m still single.
既婚 — married
既婚（きこん）means “married” in a formal or administrative sense — you will see it on forms alongside 独身 as the two main options for marital status. In everyday conversation, people typically say 結婚しています instead.
Common Mistakes English Speakers Make
Mistake 1: Translating “we’re dating” as デートしています
This is the most common and important mistake. If you want to say you are in a relationship, say 付き合っています. デートしています only tells people you are going on dates — it does not communicate couple status at all. A Japanese listener will likely assume you are describing a date you went on, not that you have a partner.
Mistake 2: Using 交際する too casually in everyday speech
If you drop 交際する into a casual conversation with friends, it can sound unnatural or stiff — like you are reading from a news script. Keep 交際する for formal or written contexts, and use 付き合う in normal speech.
Mistake 3: Confusing 婚約 and 結婚
婚約（こんやく）is engagement; 結婚（けっこん）is marriage. Congratulating someone on 婚約 when you meant 結婚 (or vice versa) is an embarrassing mix-up that is easy to make if you learn both words at the same time. Remember: 婚約 comes first, 結婚 comes after.
Mistake 4: Confusing 結婚 and 入籍
For most casual purposes, use 結婚する. 入籍する is specific to the legal paperwork moment and may confuse the picture if you use it in the wrong context. When in doubt, 結婚しました covers the general announcement of getting married.
Mistake 5: Missing the non-romantic meanings of 付き合う
If a friend says 買い物に付き合ってくれない？, they are not confessing their feelings — they are asking you to come along shopping. Pay attention to context, and remember that 付き合う often simply means “to accompany” or “to go along with.”
Mistake 6: Not knowing that 告白 comes before 付き合う
In English-speaking dating culture, a relationship often gradually becomes official without a formal moment. In Japanese culture, the 告白 — the explicit verbal confession — is the standard way to shift from “we’re going on dates” to “we are a couple.” Knowing this cultural step helps you understand the timeline and vocabulary around how relationships work in Japan.
Decision Rule: Which Relationship Word Should You Use?
Going on one date? → デートする
Use デートする to describe any single romantic outing — whether it is a first date or a date with your established partner. It is the action word for going on a date.
Officially a couple? → 付き合う (casual) / 交際する (formal)
Once the 告白 has happened and both parties have agreed to be together, use 付き合っている in conversation. Use 交際している in formal writing or when describing someone else’s relationship in an official context.
Formally engaged? → 婚約する
After プロポーズ and mutual agreement to marry, use 婚約する / 婚約しました. The person you are engaged to is your 婚約者.
Legally or officially married? → 入籍する / 結婚する
Use 結婚する for general marriage announcements and conversations. Use 入籍する specifically when referring to the act of filing the legal marriage documents at the municipal office.
Quick relationship timeline flowchart
RELATIONSHIP TIMELINE IN JAPANESE
[Two people meet / 出会う (であう)]
|
v
[Go on dates / デートする]
|
v
[One person confesses feelings / 告白する (こくはくする)]
|
|-- Accepted --> [Officially a couple / 付き合う (つきあう)]
| |
| v
| [Casual speech: 付き合っている]
| [Formal/written: 交際している]
| |
| v
| [Propose / プロポーズする]
| |
| v
| [Engaged / 婚約する (こんやくする)]
| |
| v
| [Legal registration / 入籍する (にゅうせきする)]
| [Wedding / 結婚する (けっこんする)]
|
|-- Rejected --> [Stay friends / 友達のまま]Quick Quiz
Choose the correct word for each situation. Answers are below each question.
1. You want to tell your Japanese friend that you and someone special are officially a couple. You say: 私たち、＿＿＿＿ています。
a) デート b) 付き合っ c) 婚約し
✓ Answer: b) 付き合っています — This is your relationship status; デートしています only describes going on dates.
2. You want to ask someone on a first date. The most natural phrase is:
a) 付き合ってください b) 結婚してください c) 今度、デートしませんか？
✓ Answer: c) 今度、デートしませんか？ — This is an invitation for a date. a) asks someone to be your official partner (too serious for a first ask), and b) is a marriage proposal!
3. A news article reports that two celebrities are in a relationship. The article uses:
a) 付き合っている b) 交際している c) デートしている
✓ Answer: b) 交際している — 交際する is the formal/written register used in news and official contexts.
4. Your colleague mentions 彼女に婚約指輪を渡した. What happened?
a) He gave his girlfriend a birthday present.
b) He gave his fiancée an engagement ring.
c) He proposed to a woman he just met.
✓ Answer: b) — 婚約指輪 (こんやくゆびわ) is an engagement ring. The couple is at the 婚約 stage, so she is his 婚約者.
5. Your Japanese friend says 買い物に付き合ってくれない？ What are they asking?
a) Will you be my romantic partner?
b) Will you come shopping with me?
c) Can you keep paying for my dates?
✓ Answer: b) — This is the non-romantic use of 付き合う, meaning “to accompany” or “to keep company.” No confession involved!
6. A couple posts 入籍しました on social media. What does this mean?
a) They got engaged.
b) They held their wedding ceremony today.
c) They legally registered their marriage.
✓ Answer: c) — 入籍する refers specifically to submitting the legal marriage paperwork. The wedding ceremony may happen separately.
Have you ever used デートしています when you meant 付き合っています? Or do you have experience with the 告白 moment in Japanese — either saying it or hearing it? Share your story in the comments — we would love to hear it!
Keep Learning
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` only. No raw emoji — HTML entities used throughout (✓, ✗, •, →). The 告白 cultural point is threaded through multiple sections rather than isolated to one spot, which reinforces it as a structural concept rather than a footnote. The 入籍 vs 結婚 distinction may be worth a proofreader double-check for factual accuracy, as the nuance can be subtle and readers may ask follow-up questions. The comparison tables use SWELL’s `is-style-regular` class. Word count is approximately 2,800 words, appropriate for the depth of the topic (six key words, cultural context, comparison tables, flowchart, quiz).