LESSON NOTES · レッスンノート

N4Talking to real people · Sep 15, 2026

I love you in Japanese: き, 大好だいすき, いとしてる and why the last one is almost never said

いとしてる is the dictionary translation of "I love you" and it is used far less than English "I love you" — heavy, literary, and for many couples a once-in-a-relationship sentence. The everyday confession is きです, and the everyday expression of love is usually not a declaration at all.

This is the topic where a direct translation misleads most. The words exist and are correct; the frequency and the weight are completely different, and that difference is the actual information.

The basics

The three levels

Phrase Reading Weight
すき Like / love. The workhorse.
大好だいす だいすき Really like / love a lot. Warm, often light.
いとしてる あいしてる Love, in the heavy sense. Rare.

きです。 — I like you / I love you. (polite; this is the standard confession) 大好だいすき! — I love it / I love you! (casual, warm — used for people and for things) いとしてる。 — I love you. (heavy, rare, serious)

The surprise for English speakers is that きです is a confession, not a lukewarm "I like you". Said to a person, in the right moment, it is the sentence — the 告白こくはく (こくはく, confession) that Japanese romance is built around.

Why is it きが, not きを?

Because き is an adjective, not a verb. Japanese does not say "I love you" as an action; it says "you are likeable to me". The thing liked is marked with .

くんきだ。 — I love you. (casual; literally "you are liked [by me]") 日本語にほんごきです。 — I like Japanese. (polite; same structure, different object)

So わたしはあなたをきです is the mistake — を is for verbs, and き is not one. If particles are still shaky, this pattern is the clearest example of why は and が are worth getting straight.

And the pronouns usually vanish

A real confession rarely contains わたし or あなた. The context supplies both, and including them can make the sentence sound stiff or translated.

きです。付き合つきあってください。 — I love you. Please go out with me. (polite; the classic confession, no pronouns at all)

付き合つきあってください ("please go out with me") is the other half of the standard confession. Japanese dating typically has an explicit start point rather than a gradual drift, and that sentence is it.

Beyond the basics

Why is いとしてる so rare?

Several reasons stack. It is a heavy, almost written-register word. It carries a sense of permanence that makes it awkward for everyday warmth. And Japanese affection is more often expressed through action and attention than through declaration — noticing, remembering, doing things without being asked.

There is also the famous version of this, widely retold: the novelist Sō widely retold: the novelist Sseki Natsume is said to have told students that "I love you" should be translated as がつ綺麗きれいですね ("the moon is beautiful, isn't it") — because a Japanese speaker would never say it outright. The story is almost certainly apocryphal, and it survives because it captures something true about the register.

がつ綺麗きれいですね。 — The moon is beautiful, isn't it. (the famous indirect version — recognisable to most Japanese people as a reference)

Say いとしてる in an ordinary moment and it can land as unexpectedly grave, or as a line from a drama.

So what do couples actually say?

Short, frequent, low-weight things:

大好だいすき。 — Love you. (casual; the everyday one) 一緒いっしょにいるとたのしい。 — I have fun when I'm with you. (casual, warm) ずっと一緒いっしょにいたい。 — I want to stay together. (casual, serious without being heavy)

大好だいすき is the real everyday "I love you" in most relationships — light enough to say often, warm enough to mean it.

き for things, people and activities

き covers everything from people to food to hobbies, and the strength comes from context and adverbs rather than from a different word:

アニメが大好だいすきです。 — I love anime. (polite) あまいものはあまりきじゃないです。 — I don't much like sweet things. (polite; あまり + negative = "not much")

Note きじゃない for the negative. きらい (きらい, dislike) exists but is strong — much closer to "hate" than to "don't like" — so あまりきじゃない is the polite way to decline a preference, in the same family as the soft refusals in how to say no.

こい and あい

Two nouns, both "love":

  • こい (こい) — romantic love, falling in love, the feeling directed at one person.
  • あい (あい) — love in the broad sense: family, humanity, lasting devotion.
  • 恋人こいびと (こいびと) — partner, sweetheart (gender-neutral).
  • 愛情あいじょう (あいじょう) — affection.

Song lyrics run on both. In conversation, こい appears as こいしてる ("I'm in love") and あい mostly stays in compounds.

Useful adjacent words

このみ (このみ, taste/preference), になる (to be interested in someone — a wonderfully vague pre-confession word), 片思かたおもい (かたおもい, unrequited love), 告白こくはく (こくはく, confession), 付き合つきあう (つきあう, to date), れる (ほれる, to fall for someone, casual).

ちょっとになってるひとがいる。 — There's someone I'm kind of interested in. (casual; deliberately vague)

になる is the word to have before the confession. It admits interest without committing to a declaration, which is exactly the job it does.

Common mistakes

  • Using いとしてる as the everyday "I love you". It is heavy and rare. 大好だいすき is the daily version.
  • Saying わたしはあなたをきです. き is an adjective, so the particle is が, and the pronouns are usually dropped.
  • Reading き as merely "like". Said to a person in the right moment it is a confession.
  • Using きらい for "I don't like it". It is much stronger than English "dislike". Use あまりきじゃない.
  • Expecting a gradual start to a relationship. The 告白こくはく is an explicit event, and 付き合つきあってください is the sentence that starts it.
  • Taking the がつ綺麗きれいですね story as a real translation. It is an anecdote about register, not a phrase to use on someone who will not catch the reference.

Practice

Say each answer out loud first. Questions 1 and 2 are a pair: two sentences English would translate identically.

1. Translate: きです。

Show answer

I like you / I love you — said to a person in the right moment, this is a confession, not a lukewarm compliment.

2. Translate: いとしてる。

Show answer

I love you — but heavy, rare and serious. English would use the same words; Japanese would not use them nearly as often.

3. Fix this: わたしはあなたをきです。

Show answer

きです (or くんきだ) — き is an adjective, so the particle is が, and the pronouns are normally dropped.

4. Say "I love anime."

Show answer

アニメが大好だいすきです — が marks what is liked. 大好だいすき raises the strength without changing the structure.

5. Politely say you are not keen on sweet things.

Show answer

あまいものはあまりきじゃないです — あまり plus a negative. きらい would be far too strong.

6. What is the second half of a standard confession?

Show answer

付き合つきあってください — "please go out with me". Japanese relationships usually have an explicit start.

7. What does になる mean in this context?

Show answer

To be interested in someone — deliberately vague, and the word people use before any confession exists.

8. What is the difference between こい and あい?

Show answer

こい is romantic love for one person; あい is the broad, lasting kind — family, humanity, devotion.

9. Someone says がつ綺麗きれいですね. What might they be doing?

Show answer

Referencing the famous indirect "I love you" — or genuinely commenting on the moon. The ambiguity is the entire point of the story.

10. What do couples say day to day?

Show answer

大好だいす, or non-declarations like 一緒いっしょにいるとたのしい — light enough to say often, which is what makes it the real everyday version.

FAQ

Do Japanese people never say いとしてる? They do — at weddings, in serious moments, in songs and drama. It is not extinct, it is reserved. Treating it as the everyday phrase is what misfires.

Is き too weak for a confession? No. In the confession context it is the phrase. English speakers hear "like" and assume it is mild; Japanese hears it as the declaration.

What is 告白こくはく exactly? A confession of feelings, made as a distinct event, usually with きです and 付き合つきあってください. It is a recognised social ritual rather than a coincidence of conversation.

Can I say 大好だいすき to a friend? Yes — 大好だいすき is used for friends, food, places and pets as well as partners. That breadth is exactly why it is safe.

How do I say "boyfriend" or "girlfriend"? 彼氏かれし (かれし) and 彼女かのじょ (かのじょ), or the gender-neutral 恋人こいびと. Note 彼女かのじょ also just means "she", which is a genuine source of ambiguity.

Is きらい really that strong? Stronger than "dislike" — closer to "hate" in ordinary use. あまりきじゃない is the everyday way to say you are not keen on something.

Vocabulary from this article

Tap the block to select all of it, then copy. In Anki: File → Import, note type Basic, separator Tab — the first column becomes the front, the second the back.

好き	すき — liked, loved
大好き	だいすき — loved a lot
嫌い	きらい — disliked, hated
愛	あい — love (broad, lasting)
恋	こい — romantic love
愛する	あいする — to love
恋人	こいびと — partner, sweetheart
彼氏	かれし — boyfriend
彼女	かのじょ — girlfriend; she
告白	こくはく — confession of feelings
付き合う	つきあう — to date, go out with
気になる	きになる — to be interested in; to bother
片思い	かたおもい — unrequited love
好み	このみ — taste, preference
一緒	いっしょ — together
月	つき — moon
綺麗	きれい — beautiful, clean
楽しい	たのしい — fun, enjoyable

I'm Yuuki, a Japanese teacher based in Tokyo. I've taught on italki as a Top 1% teacher and watched over 1,500 anime. This is the topic where anime is most useful and most misleading at once: the confession scenes are accurate about the ritual and wildly generous with いとしてる, which is a word most people say a handful of times in a life.

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Sources: the author's own lessons and standard reference grammars.

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