Kokoro Meaning: Heart, Mind, and Spirit in Japanese

What kokoro covers

Kokoro is the inner self. It holds emotions, such as happiness and pain, but also thoughts, intentions, sincerity and character. Kokoro no yasashii hito is a kind-hearted person; kokoro no naka de omotta means I thought it to myself, in my mind. English uses heart for the first and mind for the second, but Japanese uses the same word.

Kokoro is not the physical organ. The heart that beats is shinzō, and a heart attack is shinzō mahi or shinkin kōsoku in medical language. If you say kokoro ga itai at a clinic, it will be understood as emotional pain, not a medical symptom.

Kokoro kara and sincere feelings

Kokoro kara, from the heart, makes a feeling sincere and complete. It is common with thanks, apologies, congratulations and wishes. The written, more formal version is kokoro yori, which you will see in letters, emails and speeches.

Because it is strong, kokoro kara is best saved for meaningful moments. Using it for small favours can sound exaggerated. Kokoro o komete, with heart, describes doing something carefully and with feeling, such as cooking or writing a card.

When the heart hurts, moves or opens

Many expressions describe what happens to kokoro. Kokoro ga itai, my heart hurts, expresses emotional pain or guilt, for example when you hear sad news or feel bad about something you did. Kokoro o utsu, to strike the heart, means to move someone deeply.

Kokoro o hiraku, to open your heart, is about trusting someone. Kokoro ga oreru, the heart breaks, is closer to losing the will to continue than to romantic heartbreak; for a broken heart in love, people often say shitsuren, a lost love. These collocations are fixed, so it is best to learn them as whole phrases.

Kokoro-zuyoi and kokorobosoi

Two adjectives built on kokoro are especially useful. Kokoro-zuyoi, literally heart-strong, means reassuring or encouraging: something that makes you feel supported. It usually describes a person, a presence or a situation, not your own bravery.

Kokorobosoi, heart-thin, is its opposite: feeling uneasy, helpless or alone because you lack support. It is the natural word for being alone in a new country, travelling without a phone signal or starting a job where you know nobody.

A common mistake is using kokoro-zuyoi to mean I am brave. For personal courage, Japanese uses words such as yūki ga aru, to have courage, or tsuyoi, strong.

More everyday kokoro words

Kokoro appears in many compound words and fixed phrases you will meet in daily life, advertising and news. Some use the reading kokoro, others the reading shin.

Kokoroatari is especially practical: kokoroatari wa arimasen ka, do you have any idea, is a standard question at lost-property counters, and kokoroatari ga nai means I have no idea.

Kokoro versus ki

Ki is the word learners most often confuse with kokoro. Both deal with the inner world, but ki is about mood, attention, intention and energy in the moment, while kokoro is deeper and more lasting. Ki ni suru, to worry about something, and ki ga tsuku, to notice, are about attention; kokoro ga itamu, the heart aches, is about deep feeling.

A rough rule: if English would say mood, attention or feel like doing, choose ki. If English would say heart, sincerity or soul, choose kokoro. The separate list of thirty phrases built on ki covers that side in detail.

Kokoro versus mune

Mune, the chest, is where Japanese places physical sensations of emotion. Mune ga itai can mean chest pain or an ache of sadness, mune ga dokidoki suru is a pounding heart from nerves or excitement, and mune ga ippai means your heart is full. Mune describes the felt, bodily side of emotion.

Kokoro describes the emotion itself or the inner self that has it. Compare mune ga itamu, my chest aches with sorrow, with kokoro ga itamu, my heart grieves: both are used and close in meaning, but mune feels more physical and immediate. For literal chest pain at a doctor's, use mune ga itai, not kokoro.