What you need to know: Mizuno’s latest iteration of its technology-packed JPX iron series continues the company’s history of questioning and innovation by incorporating, for the first time, multi-material construction in the JPX family. Engineers use nickel chromoly and strategically positioned tungsten across the lineup for higher launch and steeper angles of descent. In keeping with prior model nomenclature, there are three 2024 JPX iron models — JPX 925 Hot Metal: Core model. Technology for all-around forgiveness. JPX 925 Hot Metal Pro: Hot Metal in a more compact package. JPX 925 Hot Metal HL: Larger profile for ease of launch.

2024 Mizuno JPX Hot Metal irons: What’s new, key technology

• CORTECH Design with Contour Ellipse Face: Mizuno re-engineered its multi-thickness face, producing a design 30-percent thinner than the previous generation. Center ball speed is increased, and Mizuno promises more ball speed retention further from the sweet spot.
• Multi-material construction with tungsten weighting: In the 4- 7-irons, Engineers positioned tungsten low in the body of the club for a lower center of gravity and thus higher launch.
• Chromoly 4140M: Mizuno’s malleable, high-strength face is joined to a bendable hosel for ease of fitting.
• Seamless Cup Face: As with previous generations, Mizuno incorporates one-piece seamless cup face design allowing engineers to strategically thin areas around the perimeter of the club for greater ball speed.
• Variable sole thickness: Also carried over, this design element boosts COR (greater energy transfer) by allowing for greater face flexing.
• Balanced Stability Frame: More forgiveness is created by balanced weighting throughout the JPX line. Mizuno indicates this also produces “a tour preferred vibration and sound.”
• Harmonic Impact Technology: Engineers tuned head geometry to deliver “Mizuno feel” and feedback at impact. This works in conjunction with acoustic sound ribs throughout the clubs, according to the company.

Check out in-hand photos in the GolfWRX forums.

Additional model details

Hot Metal: “All-around forgiveness”

Available 4-SW / RH and 4-SW / LH
Shafts: NS Pro 950 NEO & Recoil Dart ESX
Grip: Lamkin UT+
$150 per club

Hot Metal Pro: “A slimmer profile”

Available 4-SW / RH and 4-SW / LH
Shafts: NS Pro 950 NEO & Recoil Dart ESX
Grip: Lamkin UT+
$150 per club

Hot Metal HL: “Added launch and height”

Available 4-SW / RH
Shafts: Dynamic Gold 95 & Recoil Dart ESX
Grip: Lamkin UT+
$150 per club

What Mizuno says

“With the JPX line, we are pushing the boundaries of golf club engineering. The new Hot Metal iron family introduces a multi-material design, strategically incorporating tungsten into our Nickel Chromoly designs, enhancing distance with impressive height and spin. With three distinct models to choose from, each offering extensive custom fitting options, we uphold the quality and craftsmanship Mizuno is renowned for. We are dedicated to continually setting new standards of performance in the industry” David Llewellyn – Director of R&D, Mizuno

“Our team thrives on the JPX philosophy of innovation. The JPX line allows us to approach design in a whole new way, thinking about the future and experimenting with advanced technologies and materials. This forward-thinking mindset enables us to challenge conventions in every category of clubs—irons, drivers, and more. And even with this innovative approach, we continue to deliver the exceptional look and feel that makes Mizuno golf clubs so special.” – Chris Voshall – Product Director, Mizuno

“Having multiple fitting options is invaluable because every golfer is unique. By offering a variety of models and configurations, like those in the JPX925 Hot Metal iron family, we can tailor the clubs to match each golfer’s unique Swing DNA as measured by our Shaft Optimizer. Whether a golfer needs added height, a slimmer profile, more spin, a tailored lie angle, or any of more than 50 unique shaft options, our new JPX range and enhanced PFS System and Software ensure they receive the optimal fit for their game.” Bill Price – Director of Custom Fitting, Mizuno

Check out more in-hand photos in the GolfWRX forums.