Developed in collaboration with Kosuzu Iwao (いわお小鈴), the DIAMOND G4 redefines the “Diamond” concept with a perfect blend of beauty, precision, and performance.
This fourth-generation model captures Kosuzu’s evolving spirit - confident, bold, and radiant on and off the stage.
Triple Diamond Ring Design – Fashion Meets Function
At the heart of the DIAMOND GEN 4 lies its signature triple diamond ring motif, inspired by stacked jewellery rings.
This design creates a fashionable, layered look, combining artistic beauty with functional precision:
- The three diamond rings each feature distinct groove depths and shapes, creating varied grip textures that enhance control and prevent slipping.
- The stacked-ring structure allows the fingers to naturally recognize grip position, supporting consistent throws and stable release.
Like fine jewellery, the triple ring pattern shines with elegance—a perfect fusion of strength and sophistication.
Signature Red Line Accents – A Modern Diamond Aesthetic
Accented with vivid red lines, the barrel reflects Kosuzu’s favourite colour palette, tying the design back to the vibrant art direction of the DIAMOND series.
The red detailing not only enhances visual impact but also embodies energy, confidence, and passion, mirroring the fiery determination of the player herself.
Grip & Shape – Precision in Every Throw
- Straight Barrel Profile: Designed for versatility and balance, this shape offers smooth handling and adaptability — easy to use for both beginners and advanced players.
- Front Section: Softened shark cuts provide a smooth yet responsive touch, perfect for controlled release.
- Centre Section: Signature diamond-pattern cuts integrated with ring grooves ensure precise feedback and visual flair.
- Rear Section: Alternating mild shark cuts offer moderate yet firm grip traction, making it easy to find and maintain the perfect hold.
The entire barrel is carefully arranged to provide grip stability across all positions, supporting a wide range of throwing styles.
A Dazzling Fusion of Form and Function
The DIAMOND G4 continues the legacy of the DIAMOND series — combining competitive performance with fashion-inspired design.
Its sleek black body, bold red accents, and geometric precision embody the brilliance of its name, symbolizing both strength and individuality.
Stylish, versatile, and powerful — the DIAMOND G4 is the next evolution of brilliance, ready to shine in every game.
