Traditional East Asian Medicine Series 7The Five-Element Correspondence Chart Is Not Just a Memorization Table - Understanding the Body Through Fire (Heart)Thursday, July 30, 2026 (Reiwa 8)

Introduction - The Next Element After Wood: Fire

The Five Elements theory is a way of understanding the human body through the five natural qualities:

Wood, Fire, Earth, Metal, and Water.

In the previous article, I explored “Wood.”

Wood has the qualities of:

* Sprouting new life
* Growing upward
* Spreading branches and leaves

It represents the power of growth and expansion.

In the human body, this quality is associated with:

Wood = Liver (Kan)

So, what does the next element, “Fire,” represent?

Fire represents:

“The power to warm”
“The power to illuminate”
“The power to activate life”

This quality is connected with the Heart in traditional East Asian medicine.

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Fire - The Center of Activity and Life

The characteristics of Fire are:

* Producing heat
* Bringing brightness
* Increasing activity

In the human body, the organ system that represents this function is:

Fire = Heart

However, the “Heart” in East Asian medicine does not simply mean the physical heart as understood in Western medicine.

The Heart in traditional East Asian medicine is considered to be related to:

* Circulation of blood
* Mental activity
* Consciousness and judgment
* Emotional stability

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The Heart Governs Blood and Vessels

In East Asian medicine, there is the concept:

“The Heart governs blood and vessels.”

This expresses the idea that the Heart sends blood throughout the entire body.

When blood circulates throughout the body:

* The body remains warm
* Nutrients are delivered
* Life activities are maintained

Fire warms the body from within.

In the same way, the Heart is considered the center that supports life.

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The Heart Stores the Spirit (Shen)

One important concept for understanding the Heart in the Five-Element system is:

“The Heart stores Shen.”

Here, “Shen” does not mean a religious spirit.

It refers to human mental functions such as:

* Consciousness
* Spirit
* Thought
* Emotion
* Judgment

Just as Fire illuminates the surroundings,

when the Heart is balanced:

* The expression becomes brighter
* Judgment becomes calmer
* The mind becomes more stable

When the function of the Heart becomes disturbed, it has traditionally been associated with:

* Anxiety
* Insomnia
* Restlessness
* Difficulty concentrating

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Why Is the Heart Related to the Tongue?

In the Five-Element Correspondence Chart:

Fire = Heart = Tongue

Why are the Heart and tongue connected?

The tongue has functions such as:

* Sensing taste
* Producing speech
* Expressing emotions through words and facial expression

In East Asian medicine, the condition of the Heart was believed to appear on the tongue.

For example:

* Color of the tongue
* Condition of the tongue
* Movement of the tongue

were observed as clues to understand the condition of the Heart and blood.

Also, when people feel happy or excited, their words and expressions often change.

Therefore:

Heart (mental activity)
↓
Tongue (expression and words)

shows a connection between the two.

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Expanding the Five-Element Chart from Fire

Looking at Fire as the center:

Fire
↓
Heart
↓
Small Intestine
↓
Tongue
↓
Pulse
↓
Facial color
↓
Sweat
↓
Joy
↓
Red
↓
Summer
↓
Heat
↓
Bitter taste

These relationships are not meant to be memorized one by one.

They become easier to understand by looking at the nature of Fire.

Fire has heat and activates life.

Therefore, it connects with:

* Summer
* The color red
* Sweat
* The emotion of joy
* Blood circulation and facial color

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Conclusion - Understanding the Heart Through Fire

The Fire element in the Five-Element Correspondence Chart is not something to memorize simply as:

“Fire = Heart”

By understanding the qualities of Fire:

* The power to warm
* The power to illuminate
* The power to activate

and applying them to the human body, we can begin to understand:

Why the Heart?
Why the tongue?
Why joy?

The Five-Element Correspondence Chart is a map connecting nature and the human body in traditional East Asian medicine.

Through Wood, we explored the Liver as the power of growth.

Through Fire, we explore the Heart as the power that allows life to shine.

Next, I would like to explore:

 “Earth - Understanding the Body Through the Spleen.”

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