Hello, I’m Kodak.
You may recognize めでたい (medetai) from the greeting おめでとう (omedetou). The two words are closely related—but they are not used in the same way.
It describes an event, occasion, result, or situation. Unlike おめでとう, it is normally an adjective rather than a greeting.
めでたい (medetai) is an い-adjective meaning:
・joyful
・auspicious
・worthy of celebration
・fortunate
・having a happy outcome
今日はめでたい日です。
Today is a day worth celebrating.
However, おめでたい人 can be sarcastic and mean “a naive, overly optimistic, or gullible person.”
In this article, we will learn the positive and sarcastic meanings of めでたい, its grammar, pronunciation, spelling, origin, common phrases, anime usage, and differences from おめでとう, 幸せ, 喜ばしい, and 縁起がいい.
What Does Medetai Mean in Japanese?
Hiragana: めでたい
Romaji: medetai
Part of speech: い-adjective
Main meaning: joyful, auspicious, worthy of celebration
Other meanings: admirable, splendid, fortunate
Sarcastic meaning: naive, gullible, overly optimistic
In its most common positive use, めでたい describes something good enough to celebrate.
今日はめでたい日です。
Kyō wa medetai hi desu.
Today is a joyful and auspicious day.
二人の結婚は本当にめでたいことだ。
Futari no kekkon wa hontō ni medetai koto da.
Their marriage is truly something to celebrate.
無事に合格できて、めでたい限りです。
Buji ni gōkaku dekite, medetai kagiri desu.
It is wonderful that you successfully passed.
It describes the event or situation as happy, fortunate, or worthy of celebration.
I am happy.
⇒ Describes my emotional state.
今日はめでたい日です。
Today is a joyful day worth celebrating.
⇒ Describes the occasion.
The Core Image of Medetai
The core image is not simply “feeling good.” It is recognizing something as excellent, fortunate, and worthy of praise or celebration.
Something admirable or fortunate happens
↓
People praise it and feel joy
↓
The event deserves celebration
↓
めでたい = joyful, auspicious, worthy of celebration
That image explains why めでたい is often used for weddings, births, graduations, successful results, New Year, and happy endings.
A delicious meal is おいしい, and eating it may make you 幸せ or うれしい.
Use めでたい when the meal is part of a celebratory occasion, such as a wedding feast or New Year celebration.
How to Use Medetai: Basic Grammar
めでたい is an ordinary い-adjective. It can directly modify a noun or appear at the end of a sentence.
1. めでたい + Noun
an auspicious or joyful day
めでたい話
happy news / something worth celebrating
めでたい席
a celebratory occasion or gathering
めでたい出来事
a happy event
めでたい知らせ
joyful news
今日は二人にとってめでたい日です。
Kyō wa futari ni totte medetai hi desu.
Today is a joyful day for the two of them.
何かめでたい話でもあるの？
Nani ka medetai hanashi demo aru no?
Do you have some happy news?
○ めでたい日
× めでたいな日
Compare it with the な-adjective 幸せ:
幸せな日
2. ～はめでたい: “…Is Worth Celebrating”
新しい命の誕生はめでたい。
Atarashii inochi no tanjō wa medetai.
The birth of a new life is something to celebrate.
長年の努力が実ったのは実にめでたい。
Nagannen no doryoku ga minotta no wa jitsu ni medetai.
It is truly wonderful that years of effort paid off.
3. めでたく + Verb
The adverbial form is めでたく.
to happily and successfully get married
めでたく合格する
to successfully pass
めでたく解決する
to reach a happy or successful resolution
めでたく退院する
to be successfully discharged from the hospital
二人は来月、めでたく結婚します。
Futari wa raigetsu, medetaku kekkon shimasu.
The two of them will happily marry next month.
長い問題がめでたく解決した。
Nagai mondai ga medetaku kaiketsu shita.
The long-running problem came to a happy resolution.
めでたく解決した means the result was favorable, even if nobody organized a party.
4. Negative and Past Forms
is joyful / auspicious
めでたくない
is not joyful / is not something to celebrate
めでたかった
was joyful / was auspicious
めでたくなかった
was not joyful / was not auspicious
それはあまりめでたい話ではない。
Sore wa amari medetai hanashi de wa nai.
That is not exactly happy news.
Positive Meaning: Joyful, Auspicious, and Worth Celebrating
The positive meaning is common when talking about a formal or traditional happy occasion.
・marriage and engagement
・pregnancy and birth
・graduation and school entrance
・passing an examination
・promotion or business success
・recovery from illness
・New Year and traditional celebrations
・a happy ending to a story or problem
ご結婚とは、実にめでたいですね。
Go-kekkon to wa, jitsu ni medetai desu ne.
Your marriage is truly wonderful news.
赤ちゃんが無事に生まれたそうで、何よりめでたい。
Akachan ga buji ni umareta sō de, nani yori medetai.
I heard the baby was born safely; that is wonderful news above all else.
In casual conversation, people often say それはおめでとう！ instead of describing the event as めでたい.
The Sarcastic Meaning of Omedetai
The form おめでたい can politely mean “auspicious,” but when it describes a person or their thinking, it is often sarcastic.
an auspicious day
⇒ positive
おめでたい人
a naive, gullible, or overly optimistic person
⇒ often sarcastic or insulting
おめでたい考え
a naive or unrealistically optimistic idea
⇒ negative
そんな話を信じるなんて、君もおめでたいね。
Sonna hanashi o shinjiru nante, kimi mo omedetai ne.
You are pretty naive to believe a story like that.
何もしなくても成功できると思うなんて、おめでたい考えだ。
Nani mo shinakute mo seikō dekiru to omou nante, omedetai kangae da.
Thinking you can succeed without doing anything is incredibly naive.
The speaker acts as if the person’s unrealistically positive view is “wonderfully happy.” The real meaning is:
“You are too optimistic to understand reality.”
Is Omedetai Always Negative?
No. Context and the noun matter.
おめでたい席
a celebratory occasion
Positive
今日はおめでたい日です。
Today is an auspicious day.
Negative or sarcastic
おめでたい人
a naive person
Negative or sarcastic
おめでたい頭
a foolishly optimistic mind
“You are naive,” “You are gullible,” or “You have no idea how the world works.”
To praise a cheerful person, use 明るい人 or 前向きな人.
Medetai vs Omedetai: What Is the Difference?
The basic adjective
⇒ joyful, auspicious, admirable, worthy of celebration
おめでたい
Originally a polite or beautified form of めでたい
⇒ auspicious or celebratory
⇒ also commonly sarcastic when describing a person or idea
今日はめでたい日だ。
Kyō wa medetai hi da.
Today is a joyful day.
今日はおめでたい日です。
Kyō wa omedetai hi desu.
Today is an auspicious day.
彼は少しおめでたいところがある。
Kare wa sukoshi omedetai tokoro ga aru.
He can be a little naive.
The negative meaning comes from ironic usage. However, modern Japanese very often uses the sarcastic meaning in the form おめでたい, especially in phrases such as おめでたい人 and おめでたい考え.
Medetai vs Omedetou: Adjective vs Greeting
An adjective describing something as joyful or worthy of celebration
⇒ auspicious / joyful
おめでとう (omedetou)
A congratulatory greeting
⇒ Congratulations!
Today is a joyful day worth celebrating.
ご結婚おめでとうございます。
Congratulations on your marriage.
To congratulate someone, use おめでとう or おめでとうございます.
Learn more: Omedetou Meaning and How to Say Congratulations in Japanese
Medetai vs Shiawase: Auspicious vs Happy
The event is joyful, auspicious, or worthy of celebration
幸せ (shiawase)
A person is happy, fortunate, content, or fulfilled
結婚式はめでたい行事です。
Kekkonshiki wa medetai gyōji desu.
A wedding is a joyful and auspicious event.
二人は幸せそうです。
Futari wa shiawase-sō desu.
The two of them look happy.
A wedding is a めでたい出来事—an event worth celebrating.
The married couple may feel 幸せ—happy and fulfilled.
Learn more: Shiawase Meaning and the Japanese Kanji 幸せ
Medetai vs Engi ga Ii: Auspicious Event vs Good Omen
Something is joyful, admirable, or worthy of celebration
縁起がいい (engi ga ii)
Something is believed to be a good omen or bring good luck
結婚はめでたいことです。
Kekkon wa medetai koto desu.
Marriage is something to celebrate.
招き猫は縁起がいいと言われています。
Maneki-neko wa engi ga ii to iwarete imasu.
The beckoning cat is said to bring good luck.
The New Year occasion is めでたい because it is celebratory.
A particular food may be 縁起がいい because its shape, name, or symbolism is believed to bring good fortune.
Medetai vs Yorokobashii: Celebratory vs Pleasing
Joyful and worthy of celebration; often ceremonial or traditional
喜ばしい (yorokobashii)
Pleasing, welcome, gratifying, or a cause for happiness
Often formal and used in announcements or evaluations
これは実にめでたい知らせです。
Kore wa jitsu ni medetai shirase desu.
This is truly joyful news worth celebrating.
若い研究者が活躍するのは喜ばしいことです。
Wakai kenkyūsha ga katsuyaku suru no wa yorokobashii koto desu.
It is pleasing to see young researchers succeed.
In everyday conversation, speakers often use よかった, うれしい, or おめでとう, depending on the meaning.
The Origin and Etymology of Medetai
めでたい developed from the older form めでいたし.
めづ／愛づ (mezu)
to admire, love, praise, or be deeply moved by something
↓
めで (mede)
the continuative form of めづ
＋
いたし (itashi)
extreme; very great
↓
めでいたし
extremely admirable or worthy of praise
↓
めでたし
splendid, admirable, excellent
↓
めでたい
joyful, auspicious, worthy of celebration
Over time, the word became strongly associated with joyful and auspicious events.
How Is Medetai Connected to Omedetou?
joyful / auspicious
↓
おめでたい
polite or beautified form
↓
おめでたく
adverbial form
↓ sound change
おめでとう
Congratulations!
おめでとう developed from the adverbial form おめでたく through a common Japanese sound change called ウ音便.
How Is Medetai Written in Japanese?
Katakana for emphasis: メデタイ
Traditional phonetic spellings: 目出度い / 芽出度い
Polite form: おめでたい
Modern Japanese normally writes the word in hiragana: めでたい. The kanji spellings 目出度い and 芽出度い are ateji—characters chosen mainly for their sound.
The real origin is the spoken expression めでいたし, connected with 愛づ—to admire or praise.
Which Spelling Should Learners Use?
Natural and easy to read
Possible but old-fashioned: 目出度い
Often literary, decorative, or traditional
Possible but uncommon: 芽出度い
An auspicious-looking phonetic spelling connected visually with “sprouting”
How to Pronounce Medetai
Mora: め・で・た・い (4 morae)
Romaji: medetai
Approximate rhythm: me-de-ta-i
The final たい contains た + い. Keep the last い present rather than reducing the ending to an English “tie.”
In 食べたい, たい is a grammatical ending meaning “want to.”
In めでたい, the whole word is one adjective. It does not mean “want to mede.”
What Does Medetashi Medetashi Mean?
Romaji: medetashi medetashi
Literal feeling: joyful, joyful
Natural English: and they lived happily ever after; all’s well that ends well
めでたし is the classical form of めでたい. Repeating it at the end of a story signals that everything ended happily.
王子と姫は結婚し、いつまでも幸せに暮らしました。めでたし、めでたし。
Ōji to hime wa kekkon shi, itsu made mo shiawase ni kurashimashita. Medetashi, medetashi.
The prince and princess married and lived happily ever after. And they all lived happily ever after.
Someone may say it when a problem ends well or a complicated story finally reaches a happy conclusion.
財布も見つかったし、電車にも間に合った。めでたし、めでたし。
Saifu mo mitsukatta shi, densha ni mo maniatta. Medetashi, medetashi.
I found my wallet and caught the train. All’s well that ends well.
Other Common Expressions with Medetai
めでたい日 (Medetai Hi)
今日は家族にとってめでたい日です。
Kyō wa kazoku ni totte medetai hi desu.
Today is a joyful day for our family.
めでたい席 (Medetai Seki)
めでたい席 refers to a gathering or occasion held for a celebration, such as a wedding or formal banquet.
めでたい席なので、暗い話はやめましょう。
Medetai seki na node, kurai hanashi wa yamemashō.
Since this is a celebratory occasion, let’s avoid gloomy topics.
めでたい話 (Medetai Hanashi)
久しぶりにめでたい話を聞いた。
Hisashiburi ni medetai hanashi o kiita.
I heard some happy news for the first time in a while.
めでたく～する (Medetaku…)
兄は来月、めでたく結婚することになった。
Ani wa raigetsu, medetaku kekkon suru koto ni natta.
My older brother is happily getting married next month.
覚えがめでたい (Oboe ga Medetai)
This old-fashioned expression means that someone is highly favored or well regarded by a superior.
彼は社長の覚えがめでたい。
Kare wa shachō no oboe ga medetai.
He is in the president’s good graces.
In ordinary speech, people might say 社長に気に入られている—“He is liked by the company president.”
Medetai in Anime, Manga, and Historical Drama
In anime and manga, めでたい often appears in formal celebrations, historical settings, sarcastic dialogue, and comedic happy endings.
This is wonderful news!
実にめでたい日だ。
It is truly an auspicious day.
宴だ！今日はめでたいぞ！
A feast! Today is a day to celebrate!
ずいぶんおめでたい奴だな。
You are unbelievably naive.
めでたし、めでたし。
And they lived happily ever after.
That does not mean the word is obsolete, but dramatic fiction may use it more frequently than everyday conversation.
Natural Example Sentences with Medetai
今日は本当にめでたい日だ。
Kyō wa hontō ni medetai hi da.
Today is truly a day worth celebrating.
ご結婚とは、めでたいですね。
Go-kekkon to wa, medetai desu ne.
Your marriage is wonderful news.
赤ちゃんが無事に生まれたのは何よりめでたい。
Akachan ga buji ni umareta no wa nani yori medetai.
Nothing is more wonderful than the baby being born safely.
彼はめでたく第一志望の大学に合格した。
Kare wa medetaku dai-ichi shibō no daigaku ni gōkaku shita.
He successfully got into his first-choice university.
事件はめでたく解決した。
Jiken wa medetaku kaiketsu shita.
The case came to a happy resolution.
二人の門出を祝う、めでたい席です。
Futari no kadode o iwau, medetai seki desu.
This is a celebratory gathering marking the couple’s new beginning.
何かめでたいことがあったの？
Nani ka medetai koto ga atta no?
Did something worth celebrating happen?
新年早々、めでたい知らせが届いた。
Shinnen sōsō, medetai shirase ga todoita.
Joyful news arrived right at the beginning of the New Year.
成功を疑わないなんて、ずいぶんおめでたい考えだ。
Seikō o utagawanai nante, zuibun omedetai kangae da.
Assuming success is guaranteed is an extremely naive idea.
そんなうまい話を信じるとは、おめでたい人だ。
Sonna umai hanashi o shinjiru to wa, omedetai hito da.
You are naive to believe such a too-good-to-be-true story.
最後はみんな仲直りして、めでたし、めでたし。
Saigo wa minna nakanaori shite, medetashi, medetashi.
In the end, everyone made up, and they all lived happily ever after.
おめでたい席で争うのはやめよう。
Omedetai seki de arasou no wa yameyō.
Let’s not argue at a celebratory occasion.
退院できたのはめでたいが、まだ無理はできない。
Taiin dekita no wa medetai ga, mada muri wa dekinai.
It is good news that you left the hospital, but you still should not overdo things.
この物語はめでたい結末を迎えた。
Kono monogatari wa medetai ketsumatsu o mukaeta.
This story reached a happy ending.
Common Beginner Mistakes
Mistake 1: Using Medetai as “I Am Happy”
This can sound like “I am naive” or “I am someone to be celebrated.”
○ 私は幸せです。
I am happy.
○ うれしいです。
I am glad.
Mistake 2: Saying Medetai Directly Instead of Omedetou
合格おめでとう！
Congratulations on passing!
Description:
合格はめでたいことだ。
Passing is something worth celebrating.
Mistake 3: Calling Someone Omedetai as a Compliment
おめでたい人 usually sounds sarcastic. Use 明るい人, 前向きな人, or 楽観的な人 when you intend a neutral or positive description.
Mistake 4: Adding な Before a Noun
○ めでたい日
Mistake 5: Interpreting the Ateji Literally
目出度い and 芽出度い are phonetic spellings. The word’s actual origin is connected with 愛づ and めでいたし.
Mistake 6: Confusing Medetai with the ～たい “Want To” Form
The final sound in めでたい is part of the adjective itself. It is not the desire form used in verbs such as 食べたい.
めでたい日 ⇒ a day worth celebrating
おめでとう ⇒ Congratulations!
And be careful with おめでたい人, which usually means “a naive person.”
FAQ About Medetai
What does medetai mean?
めでたい means joyful, auspicious, fortunate, admirable, or worthy of celebration. It can also be sarcastic and mean naive or overly optimistic.
Is medetai an adjective?
Yes. It is an い-adjective. Use めでたい日 before a noun and めでたく終わる when modifying a verb.
What is the difference between medetai and omedetou?
めでたい is an adjective describing an event as joyful or worthy of celebration. おめでとう is the greeting “Congratulations.”
What does omedetai mean?
It can politely mean auspicious or celebratory. When describing a person or idea, it often sarcastically means naive, gullible, or unrealistically optimistic.
Is omedetai rude?
Expressions such as おめでたい人 and おめでたい考え can be insulting because they criticize someone as naive or foolishly optimistic.
How do you write medetai in Japanese?
The normal modern spelling is めでたい. Traditional phonetic spellings include 目出度い and 芽出度い.
What is the origin of medetai?
It developed from めでいたし, combining the continuative form of めづ／愛づ, “to admire or praise,” with いたし, “extreme or very great.”
What does medetashi medetashi mean?
めでたし、めでたし is a traditional story ending meaning “and they lived happily ever after” or “all’s well that ends well.”
What is the difference between medetai and shiawase?
めでたい describes an occasion as joyful and worthy of celebration. 幸せ describes a person or state as happy, fortunate, and fulfilled.
What is the difference between medetai and engi ga ii?
めでたい describes something joyful or celebratory. 縁起がいい describes something believed to be a good omen or bring good luck.
Can medetai mean “happy ending”?
Yes. Expressions such as めでたい結末 and めでたく解決する describe a happy or successful ending.
Can I say watashi wa medetai?
Be careful. 私はめでたい may sound like you are calling yourself naive or saying you are a person worthy of celebration. For “I am happy,” use 私は幸せです or うれしいです.
Summary: Medetai Meaning and Japanese Usage
めでたい means joyful, auspicious, fortunate, or worthy of celebration.
● Grammar
It is an い-adjective.
めでたい日 = an auspicious day
めでたく終わる = end happily
● Sarcastic meaning
おめでたい人 or おめでたい考え often means naive, gullible, or overly optimistic.
● Difference from おめでとう
めでたい describes an event.
おめでとう congratulates a person.
● Difference from 幸せ
めでたい = the occasion is worthy of celebration
幸せ = the person feels happy or fulfilled
● Origin
めでたい developed from めでいたし, connected with 愛づ, “to admire or praise,” and いたし, “extreme.”
● Writing
Recommended: めでたい
Traditional ateji: 目出度い / 芽出度い
● Story ending
めでたし、めでたし = and they lived happily ever after
Something is so admirable that people praise it
↓
It becomes a joyful event worthy of celebration
↓
めでたい = auspicious, joyful, worth celebrating
Related Article
For all the common ways to celebrate and congratulate someone in Japanese, see How to Congratulate in Japanese: “Congratulations” in Japanese.
References
- Kotobank: めでたい — meanings, historical examples, etymology from めでいたし, and older uses meaning admirable or splendid.
- Kotobank: 目出度い — modern definitions, grammar, ateji spellings, and sarcastic usage.
- Kotobank: おめでたい — positive and ironic meanings, including naive and overly optimistic.
- Kotobank: おめでとう — development from おめでたく and its use as a congratulatory greeting.
- Kotobank: 愛でる — the underlying sense of admiring, loving, praising, or being moved by something.
- Kotobank: めでたしめでたし — traditional use at the happy end of a story.
- Kotobank Japanese–English Dictionary: 芽出度い・目出度い — English equivalents and examples such as auspicious occasions and happy endings.