Meaning
The kanji 心 (kokoro) represents the very essence of human emotion and thought. While it can refer to the physical organ, its primary role in Japanese is to describe the spirit, the mind, and the seat of our feelings. Whether you are feeling joy, sorrow, or determination, those emotions are said to reside in your 心.
Historically, this character began as a pictograph. Ancient oracle bone script showed a literal drawing of a human heart, including its chambers and valves. Over time, the shape was stylized into the four-stroke character we see today. The curved bottom stroke depicts the heart's main body, while the three dots symbolize the blood vessels or valves.
As an N4 level kanji taught in the 2nd grade, 心 is a cornerstone of the Japanese writing system. It frequently appears as a radical (a meaning-bearing component) in hundreds of other characters related to the psyche. For instance, it appears at the bottom of 思う (to think) and on the left in its vertical form (忄) in words like 忙しい (busy).
Readings
On'yomi (音読み) — Chinese-derived readings
The primary on'yomi is シン (SHIN). You will encounter this reading in compound words (jukugo) that describe psychological states, abstract concepts, or medical terms. Because the 'heart' is central to human experience, this reading appears in many high-frequency vocabulary words.
- 安心 (anshin) — Relief or peace of mind.
- 心配 (shinpai) — Worry or anxiety.
- 中心 (chuushin) — Center, core, or middle.
- 心臓 (shinzou) — The physical, anatomical heart.
Kun'yomi (訓読み) — Native Japanese readings
The native reading is こころ (kokoro). When the kanji stands alone, it almost always takes this reading. It refers to 'heart' in an emotional or spiritual sense—your character, your sincerity, or your mindset. If you want to describe someone as 'kind-hearted,' this is the reading you use.
- 心 (kokoro) — Heart, mind, or spirit.
- 心強い (kokorozuyoi) — Reassuring or heartening.
- 心持ち (kokoromochi) — A slight feeling or mood.
- 心得る (kokoroeru) — To be aware of or to understand.
Common Words & Compounds
The versatility of this kanji allows it to form words covering everything from city planning to deep philosophy. Here is how it is used in daily life:
Psychology & Emotion
- 内心 (naishin) — One's real intentions or inner thoughts.
- 好奇心 (koukishin) — Curiosity (lit. 'a heart that likes the strange').
- 感心 (kanshin) — Admiration or being impressed.
- 決心 (kesshin) — Determination or making up one's mind.
- 熱心 (nesshin) — Enthusiasm or zeal.
Locations & Concepts
- 重心 (juushin) — Center of gravity.
- 都心 (toshin) — The heart of a city or city center.
- 核心 (kakushin) — The core or crux of an issue.
Attitude & Conduct
- 用心 (youjin) — Caution or taking precautions.
- 良心 (ryoushin) — Conscience (lit. 'good heart').
- 本心 (honshin) — True feelings.
Example Sentences
彼はとても心が優しい人です。
kare wa totemo kokoro ga yasashii hito desu.
He is a very kind-hearted person.
テストの結果を聞いて、安心しました。
tesuto no kekka wo kiite, anshin shimashita.
I was relieved to hear the test results.
何か心配なことがありますか。
nanika shinpai na koto ga arimasu ka.
Is there something you are worried about?
駅はまちの中心にあります。
eki wa machi no chuushin ni arimasu.
The station is in the center of the town.
車に用心してください。
kuruma ni youjin shite kudasai.
Please be careful of cars.
彼女の熱心な態度に感心しました。
kanojo no nesshin na taido ni kanshin shimashita.
I was impressed by her enthusiastic attitude.
心から感謝しています。
kokoro kara kansha shite imasu.
I am grateful from the bottom of my heart.
子供は好奇心が強いです。
kodomo wa koukishin ga tsuyoi desu.
Children have strong curiosity.
Related Kanji
- 頭 — Head, Leader, Top (Kanji N4)
- 弟 — Younger Brother, Junior (Kanji N4)
- 黒 — Black, Dark (Kanji N4)
- 洗 — Wash (Kanji N4)
- 短 — Short, brief, defect (Kanji N4)
- 田 — Rice Field (Kanji N4)
Memory Tip
Think of the kanji 心 as a vessel holding four drops of emotion. The main curved stroke is a bowl or the heart muscle itself, and the three dots are the flickering flames of your spirit dancing within it. Alternatively, imagine it as a simplified anatomy sketch: the bottom curve is the heart's base, and the dots are the blood being pumped out through the valves. Whenever you see this shape, remember it contains everything that makes us human.