K3 Attribution Tennis Method™ — Official

Author: Ryota Kurono / K3 Attribution Tennis Coach

Brand: TENNIS DE PON

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0. Prologue — Introduction

There was a time when tennis was believed to be defined by technique, physical strength, and mindset.

However, after spending more than 30 years on court—coaching children, adults, competitive players, and wheelchair tennis athletes—I can say this with certainty:

Victory is not determined simply by what you can or cannot do.

What determines the outcome is:

Why you succeeded — or why you didn’t.

It is the meaning you assign to performance.

This is Attribution,

and it is the foundation of the K3 Attribution Tennis Method™.

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**CHAPTER 1

What is the K3 Attribution Tennis Method™?**

● The Three “K”s

Kokorokubari (Consideration)

Kikubari (Attentiveness)

Mekubari (Awareness)

These three values form the K3 concept.

When all three are present, improvement accelerates—naturally.

Coaching is not merely the passing on of technical skills.

It deals with the heart, gives meaning, and keeps the flame of growth alive.

● K3 redefines tennis coaching

Conventional coaching

→ “Fix your form.”

→ “Swing more.”

→ “Use more power.”

K3 Method

→ “Why did you miss?”

→ “What caused it?”

→ “Which factor can be adjusted?”

The difference is perspective:

Not anger, but observation.

Not blame, but breakdown.

And so:

❗Mistakes are not ability — they are factors.

❗Factors can be analyzed — and improved.

This mindset is what we instill into the court.

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**CHAPTER 2

Why Attribution Determines the Speed of Improvement**

● The way you explain failure shapes your future

Example: After hitting the net

❌ “Same mistake again.”

❌ “You’re mentally weak.”

❌ “Bad day today.”

These attribute failure to external or unchangeable causes.

They shut down motivation.

(Coaches rarely go this far, but parents often do — I see it frequently.)

Instead, guide like this:

🔰 “Your contact point was behind your body.”

🔧 “Your racket face opened by 2°.”

“You’re already close enough to correct it.”

→ Attribute failure to adjustable factors

→ The player moves forward

● Confidence through science

Not intuition — but explanation.

Improvement is not vague.

It is structural.

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**CHAPTER 3

Tennis is Physics — Vectors Create Trajectories**

● Four variables that define a swing

1. Racket face angle

2. Swing path direction (vector)

3. Impact position

4. Speed (efficiency, not strength)

● Tennis can be explained with formulas

Depth = Impact Angle × Initial Velocity × Spin Rate

Drive = (Initial Velocity ÷ Spin) × Spin Ratio

Height = Determined by Racket Face Angle

Not feelings — but visualization, quantification, correction.

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**CHAPTER 4

Angular Momentum Creates Power**

● Power flows only one direction

Ground → Legs → Core → Shoulder → Elbow → Wrist → Racket

If the chain breaks, power disappears.

Swinging harder is not the solution.

The key is connection.

● Typical correction example

❌ Arm-driven swing →

⭕ Hip → Core → Arm kinetic chain

Fix one link — the ball quality transforms.

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**CHAPTER 5

Biomechanics-Based Motion Diagnosis**

● Failure does not equal laziness

The body has realities.

Examples:

• Stiff thoracic spine → Excess rotation, closed face

• Limited wrist mobility → Insufficient spin creation

• Poor hip external rotation → Difficult open stance

→ Build technique to match the body, not force it.

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**CHAPTER 6

The K3 Attribution Coaching Model**

Physics Biomechanics Psychology

Face angle error Hip collapse Fear of results

Vector deviation Core delay Memories of past failure

Spin ratio breakdown Stance width mismatch Attribution to “can’t”

We separate → attribute → correct → re-evaluate.

This is the K3 coaching formula.

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**CHAPTER 7

Why Beginners to Intermediates Improve Dramatically**

Because their failures are not talent—but structure.

✔ Contact point

✔ Swing path

✔ Physical characteristics

✔ Attribution correction

Fix these, and the game transforms.

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**CHAPTER 8

TENNIS DE PON and My Future Vision**

For 30 years, I have watched tennis and people.

Wheelchair tennis, junior development, recreation, competitive training—

Joy, challenge, and growth.

And I want to prove one thing:

Tennis improvement is possible for anyone through correct meaning-making.

TENNIS DE PON is the flag.

K3 Attribution Tennis Method™ is the proof.

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Appendix / Reference Materials

📌 7-Variable Swing Chart

📌 Beginner Diagnostic Checklist

📌 Attribution-Shift Coaching Questions

📌 Author Page — Ryota Kurono

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Author Profile (English Edition)

Ryota Kurono — Head Professional Tennis Coach

Creator of K3 Attribution Tennis Method™ / TENNIS DE PON

A professional coach with 30 years of experience,

certified by the Japan Professional Tennis Association.

Former Head Coach at Tennis Lounge (9 years)

Wheelchair & Performance Tennis Development Lead at Yoshida Tennis Center (14 years)

CEO of High Infinity 54 (7 years)

Currently Director of Program Development at MAT Tennis Academy, Gunma, Japan

Kurono integrates Physics, Biomechanics, and Attribution Psychology,

delivering measurable improvement for beginners through competitive players.

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