How to Say Happy Anniversary in Japanese: Kinenbi Omedetō and More

Happy anniversary in Japanese: the four key phrases

Kinenbi (記念日) means a day to remember: 記念 is commemoration and 日 is day. On its own it can be any anniversary, from a national holiday to the day you adopted your cat, so between partners kinenbi omedetō is understood at once as our anniversary. Omedetō is the congratulation word you also hear in tanjōbi omedetō, happy birthday.

The four cards below cover most situations: the everyday phrase, the wedding version, the way couples count their time together, and the shūnen form used for organisations and careers.

The ladder: from a message to your partner to a formal greeting

The words stay almost the same as you climb the ladder; what changes is the ending. Omedetō is casual and fits partners, close friends and family. Omedetō gozaimasu is polite and fits colleagues, your partner's parents, a teacher or a neighbour. For written greetings to a business partner, oiwai mōshiagemasu, I offer my congratulations, is the formal step at the top.

The honorific go- in go-kekkon is used when you speak about someone else's marriage politely. You would not say it about your own wedding.

Couples: counting the time with tsukiatte ~ nen

Tsukiau (付き合う) means to go out with someone, and tsukiatte is its te-form: since we started going out. Add a length of time and you have the most natural anniversary line between partners: tsukiatte ichi-nen, one year; tsukiatte san-nen, three years; tsukiatte hantoshi, half a year. Kyō de, as of today, makes it sound like a celebration of this exact date.

Some couples, often younger ones in their first months together, also mark each month: tsukiatte ikkagetsu, one month; tsukiatte sankagetsu, three months. Others only celebrate the yearly date, and plenty of couples barely mark it. There is no fixed rule, so treat the monthly custom as something you might meet rather than something expected.

Married couples count from the wedding: kekkon shite go-nen, five years since we married. Shūnen is possible for a marriage too, as in kekkon jusshūnen, but between the two of you the plain counting form sounds warmer.

What to say or write to your partner

In Japanese, the anniversary greeting is usually short, and the feeling is carried by thanks and by looking ahead. Itsumo arigatō, thank you for always being there, is the line that appears in most anniversary messages. Kore kara mo yoroshiku ne, roughly please keep being with me, closes the message the way English might say here's to many more years.

Direct declarations exist but are used sparingly. Daisuki da yo, I love you, is common between partners. Aishiteru is the strong, dramatic version that many people rarely say out loud, so in a message it can feel heavier than in English. Deaete yokatta, I'm so glad I met you, is a warm middle ground.

Texting versions are shorter and softer. Many people send kinenbi omedetō with a heart or a cake emoji, followed by one line of thanks, and save the longer words for when they meet.

Wedding anniversaries for parents and friends

When the anniversary belongs to someone else, such as your parents or a married friend, the polite form is the safe choice unless you always talk casually with them. For your own parents, casual speech is normal: otōsan, okāsan, kekkon kinenbi omedetō.

Two milestones have special names that many people know: ginkonshiki (銀婚式), the silver wedding at twenty-five years, and kinkonshiki (金婚式), the golden wedding at fifty. Families sometimes mark them with a dinner or a small trip, and it is a nice moment to use the word if you know it is coming.

Work anniversaries and company milestones

For organisations, shops and careers, Japanese uses shūnen (周年), the number of full years. Note the sound changes in the readings: go-shūnen for five, jusshūnen for ten, nijusshūnen for twenty. Nyūsha (入社) is joining a company, and nyūsha jusshūnen is ten years since you joined.

Kinzoku (勤続) means continuous service and is often used at ceremonies for long service. The natural thing to add is otsukaresama desu or otsukaresama deshita, thanks for all your hard work, rather than a cheerful happy anniversary. For a client's company milestone, the written form oiwai mōshiagemasu belongs in a letter or email.

How people reply, plus a mini dialogue

The reply is thanks, often with the same wish turned back: arigatō, kore kara mo yoroshiku ne. If your partner remembered a date you thought they had forgotten, oboetete kureta n da, you remembered, is a happy reaction. At work, a simple arigatō gozaimasu followed by kore kara mo ganbarimasu, I'll keep doing my best, is the expected answer.

Common mistakes with anniversary phrases

• Translating happy word for word: shiawase na kinenbi o sounds like a card, not a person. Use kinenbi omedetō.
• Using the katakana happī anibāsarī in conversation. It is fine on a cake, odd in your mouth.
• Saying shūnen for a couple's first few months. Shūnen is for full years; months use kagetsu.
• Adding the honorific go- to your own marriage. Go-kekkon is for other people's.
• Being stiff with your partner: kinenbi omedetō gozaimasu to a boyfriend or girlfriend sounds like a coworker, unless you are joking.
• Forgetting the thanks. A Japanese anniversary message without arigatō can feel oddly empty.