Meaning
恋 (REN / koi) is the kanji for romantic love — the kind that races your heart and clouds your thinking. Japanese has several words for love, but 恋 belongs specifically to passionate attraction between people. It carries not just warmth, but also longing, infatuation, and sometimes the sting of feelings that go unreturned.
恋 and 愛 (ai) are often confused. 愛 covers broader territory — parental love, friendship, spiritual devotion — while 恋 stays firmly in romantic ground. Think of 愛 as a steady flame and 恋 as the sudden spark. Many Japanese speakers describe 恋 as what you feel at the start of a relationship, before it slowly deepens into 愛.
The older form of this kanji is 戀, a more elaborate character with 糸 (thread) flanking both sides and 心 (heart) at the base. The image it conjures: a heart tangled in threads, unable to break free. Today's simplified 恋 keeps 心 at the bottom with the tangle compressed above it. At 10 strokes, it is taught in Jōyō grade 8 (secondary school), with 心 (kokoro, heart) as its radical.
Readings
On'yomi (音読み) — Chinese-derived readings
The main on'yomi is レン (REN), the Sino-Japanese reading found in formal compound nouns. This is the form you'll encounter most in written Japanese, literature, and set expressions.
恋愛 (ren'ai) — romantic love; being in a relationship. 恋愛 turns up everywhere: conversation, song titles, drama synopses, dating advice books.
失恋 (shitsuren) — heartbreak; losing someone you love. The character 失 means "to lose," making 失恋 literally "lost love." Every Japanese speaker knows this word from experience.
恋歌 (renka) — a love poem or love song. This term runs through classical Japanese poetry traditions such as waka and haiku, where romantic longing is a recurring theme.
Kun'yomi (訓読み) — Native Japanese readings
The kun'yomi readings are where 恋 lives in everyday speech — native Japanese expressions of love, shaped over centuries.
こい (koi) is the most common kun'yomi. As a standalone noun it means love or romantic feelings, and it anchors many everyday compound words.
恋人 (koibito) — a lover, boyfriend, or girlfriend. Literally "love-person," it is the standard everyday word for a romantic partner.
初恋 (hatsukoi) — first love. Few phrases carry as much emotional weight in Japanese culture. Novels, films, and J-pop songs return to 初恋 again and again as a touchstone of bittersweet youth.
恋心 (koigokoro) — the first stirring of romantic feeling; love just beginning to surface.
こいしい (koishii) is an adjective meaning "dear," "beloved," or "deeply missed." It describes the ache of longing for someone or something absent — more poetic and emotionally weighted than plain 好き (suki).
恋しい人 (koishii hito) — a beloved person; someone you miss or yearn for.
こがれる (kogareru) means to yearn or pine for someone — a burning, consuming longing. It lives more in literature and poetry than in casual speech.
恋焦がれる (koi kogareru) — to burn with longing for someone; to pine deeply and without relief.
Common Words & Compounds
恋 appears across a wide range of compounds, from casual conversation to classical literature.
Relationships & Partners
- 恋人 (koibito) — lover, boyfriend or girlfriend
- 恋仲 (koinaka) — being in a romantic relationship; a couple
- 片思い (kataomoi) — one-sided love (note: uses 思い, but conceptually paired with 恋)
- 片恋 (katakoi) — unrequited love; loving someone who does not love you back
Emotional States
- 恋心 (koigokoro) — a feeling of love, romantic stirring
- 恋しい (koishii) — dear, missed, yearned for
- 失恋 (shitsuren) — heartbreak, broken heart
- 恋煩い (koiwazurai) — lovesickness; suffering from the pangs of love
Actions & Processes
- 恋愛 (ren'ai) — romantic love, falling in love
- 恋焦がれる (koi kogareru) — to pine for, to yearn intensely
- 恋に落ちる (koi ni ochiru) — to fall in love (literally "to fall into love")
Cultural & Literary Terms
- 初恋 (hatsukoi) — first love
- 恋文 (koibumi) — a love letter
- 恋歌 (renka) — love poem, love song
- 恋愛小説 (ren'ai shōsetsu) — romance novel
Example Sentences
彼女は初恋の人を今でも覚えている。
Kanojo wa hatsukoi no hito wo ima demo oboete iru.
She still remembers the person she first fell in love with.
恋は突然始まることが多い。
Koi wa totsuzen hajimaru koto ga ōi.
Love often begins without warning.
失恋して、彼はしばらく落ち込んでいた。
Shitsuren shite, kare wa shibaraku ochikonde ita.
After his heartbreak, he was down for a while.
恋愛映画を見て、涙が止まらなかった。
Ren'ai eiga wo mite, namida ga tomaranakatta.
I watched the romance film and couldn't stop crying.
あの頃の故郷が恋しくてたまらない。
Ano koro no furusato ga koishikute tamaranai.
I can't help but miss my hometown from those days.
彼女に恋をしていることに気づいたのは最近のことだ。
Kanojo ni koi wo shite iru koto ni kidzuita no wa saikin no koto da.
I only recently realized I was in love with her.
恋人からの手紙を何度も読み返した。
Koibito kara no tegami wo nandomo yomikaeshita.
I read my lover's letter over and over again.
片恋は辛いが、その気持ちは本物だ。
Katakoi wa tsurai ga, sono kimochi wa honmono da.
Unrequited love is painful, but those feelings are real.
二人は長年の恋愛の末に結婚した。
Futari wa naganen no ren'ai no sue ni kekkon shita.
The two of them married after years together.
彼は幼なじみに恋焦がれていた。
Kare wa osananajimi ni koi kogarete ita.
He pined for his childhood friend.
Memory Tip
Start at the bottom of 恋: the 心 (heart) radical. That's where the emotion sits. Now look up — those compressed strokes are what remains of the tangled 糸 (threads) from the traditional form 戀. Picture a heart caught in knots it cannot undo. That helpless, wonderful, agonizing feeling is exactly what 恋 means. When writing the kanji, draw the tangle on top first, then anchor the heart beneath it, trapped and longing.
For the sound: koi echoes the English word "coil" — your heart, coiled tight.