Mizuno have revealed the latest evolution of the JPX irons series; the JPX919 Tour, JPX919 Hot Metal and JPX919 Forged irons
The Mizuno JPX range has been a huge success on tour and in pro shops, and when Brooks Koepka back to back 2017 US Open's with a set of Mizuno JPX900 Tour irons - the Japanese company were obviously delighted.
But the JPX900 series are two years old now – so they’re being replaced by, in our view, some of the best-looking irons Mizuno have ever made. They’re called JPX919, and are a highly engineered family of irons that have evolved alongside Mizuno's comprehensive custom-fitting programme to deliver exceptional performance.
The new family comprises of the JPX919 Tour, JPX919 Hot Metal and JPX919 Forged, with each model engineered from different base materials to help enhance performance for particular swing types.
The JPX919 Tour is forged from 1025E Pure Select Mild Carbon steel; the JPX919 Hot Metal is crafted from high-strength Chromoly 4140M; and the JPX919 Forged is Grain Flow Forged from Boron-infused steel. Despite their design differences, all three JPX919 irons are unmistakably Mizuno in profile and sensation through impact. Here's what you need to know about them.
Mizuno JPX919 Tour Irons
JPX919 Tour: £135 / €175 / SEK 1,659 per iron
Availability: 3-PW / RH only
The JPX919 Tour promises tour-calibre performance with precision distance control. It is a more compact, streamlined evolution of Mizuno’s standout JPX900 Tour iron from 2017/18, which helped to re-establish Mizuno's presence on Tour among both contracted and non-contracted players.
Grain Flow Forged HD (High Density) from a single billet of 1025E Pure Select mild carbon steel in Hiroshima Japan, the JPX919 Tour offers the softest, purest Mizuno feel yet.
The JPX919 Tour has that compact, lean look over the ball, with the top edge narrowed by 10% compared to its predecessor to match the grinds most commonly requested on tour. Despite this, it offers surprising stability for a compact players’ iron, delivering tight distance patterns on off-centre strikes courtesy of a frame that is open at the heel portion to enhance stability and launch, while still producing a tour-preferred vibration and sound at impact.
"The JPX919 Tour’s compact profile doesn't tell the whole story,” says Jeff Cook, Mizuno’s PGA Tour Manager. “There’s a surprising level of stability and distance control built into this geometry. Its predecessor attracted a new wave of younger tour players into Mizuno irons and made a big impact by winning back-to-back US Opens and recording a course record 61 at St Andrews.”
The JPX919 Tour also features a Pearl Brush chrome-plated finish to enhance durability and soften its precise lines in bright sunlight and can be built to a customer’s desired specification as part of a full, split or short set.
Mizuno JPX919 Hot Metal Irons
JPX919 Hot Metal: £120 / €155 / SEK 1,449 per iron
Availability: 4-LW / RH & LH
The JPX919 Hot Metal is engineered for the perfect blend of ball speed and soft, controllable landing angles. High-strength Chromoly 4140M has paved the way to a new multi-thickness face to promotes faster ball speeds, while Mizuno say a seamless one-piece cup face construction ensures surprising levels of feedback even with these ball speeds.
It shares the JPX919 Tour’s new stability frame, which is open at the heel portion to enhance stability, launch and a loft-appropriate flight apex for controlled, soft-landing approaches. Re-engineered Sound Ribs have been developed to hit specific vibration patterns that ensure a satisfying sensation through impact, with the JPX919 Hot Metal featuring the same Pearl Brush finish as the JPX919 Tour.
The JPX919 Hot Metal offers a steeper transition into more compact scoring irons and wedges, with set-matching gap, sand and lob wedges available engineered from a softer X30 steel and blessed with precision-milled grooves and faces for improved spin and control around the greens.
“The most impressive thing about the JPX919 Hot Metal is the launch control and flight apex,” says Chris Voshall, Senior Engineer at Mizuno. “The extra ball speed and distance doesn’t come from low-flying bullets - we work the design backwards from the correct landing angles. These are irons for the golf course, not just the launch monitor!”
Mizuno JPX919 Forged Irons
JPX919 Forged: £135 / €175 / SEK 1,659 per iron
Availability: 4-PW / RH & LH
The new Mizuno JPX919 Forged irons feature a new reverse-milled clubface, which is CNC-milled from the sole up to create a larger area of minimum face thickness and makes the streamlined JPX919 Forged Mizuno’s fastest ever forged iron in terms of measured ball speed. The resulting weight removed from the face also allows a lower, deeper centre of gravity making it easier to flight the long and mid-irons.
Mizuno’s trademark workability and elevated Grain Flow Forged HD feedback ensure that the JPX919 Forged is also Mizuno’s most versatile iron.
Like the JPX919 Tour and JPX919 Hot Metal, Mizuno's JPX919 Forged features a durable Pearl Brush finish and a stability frame, open at the heel portion to enhance stability, launch and loft-appropriate flight apex for soft-landing approaches.
The Forged model is Grain Flow Forged HD (High Density) from a single billet of 1025B mild carbon steel in Hiroshima Japan for unmistakable Mizuno feel, with just a trace of Boron infused into the billet to make it 30% stronger and allow greater design possibilities in a forged head. The overall package is one of “balanced performance” with the JPX919 Forged offering what the brand say is the ultimate blend of ball speed, stability and feedback within a more refined playing profile.
“A deeper, wider milling across the back of the face allows the JPX919 Forged to transfer more energy to the ball than any previous Grain Flow Forged iron,” says David Llewellyn, Director of Golf R&D at Mizuno. “None of that would have been possible without that small addition of Boron into our steel billets, which gives that additional strength needed to reinforce the face.”