Muscleback Precision

The S-1 is a true blade, shaped for elite ball control. A thin topline, minimal offset, and compact blade length give it a classic profile at address. The clean lines and squared-off toe appeal to players who want no distractions and complete command over shape and trajectory.

Grain Flow Forged Feel

Each head is forged from a single billet of 1025E carbon steel at Mizuno’s facility in Hiroshima, Japan. This process creates a dense, responsive strike that translates every nuance of the swing into feedback. The result is a feel that’s unmistakably soft and precise, the hallmark of Mizuno blades.

Refined for Pure Strikers

Designed for consistent turf interaction, the S-1 features a modest sole width with subtle camber and a slight bevelled leading edge. These details encourage clean entry and efficient exit through the turf, supporting crisp ball-first contact in all conditions.

Minimalist Design, Maximum Intent

Visually, the S-1 is as restrained as it gets, no unnecessary shaping or detail, just a clean muscleback silhouette. it’s a modern take on the traditional blade, stripped back to focus purely on performance, feel, and control.

For the Game That Doesn’t Need Help

The S-1 is built for players who don’t need correction or forgiveness from their irons. it’s made for those who rely on a consistent swing, precise impact, and the ability to flight the ball to suit the shot. In that space, it’s as close to perfect as Mizuno has ever made.

Specifications