Mizuno Golf has released several lines of popular irons over the years, and they continue to evolve. GlobalGolf is going to break down the evolutions of the Mizuno JPX 800 and MP H4 irons, two of the most groundbreaking golf irons in the market.

Mizuno Golf produces irons that are known for their workability and popularity among low handicappers and Tour players. Each family of Mizuno irons holds special features, and compared to when they were originally released, have added several technology enhancements that are worth a second look.

How the Mizuno JPX 800 Line Evolved to the Mizuno JPX 921 Irons - Game Improvement Irons for High Handicappers

Despite the buzz around the Mizuno JPX921 irons, the Mizuno JPX 800 irons are by no means old. The 2011 JPX 800 irons contain plenty of technology that keep them relevant today. Let’s dive into each evolution of this line of Mizuno irons and how each model stands apart - namely, with their distance gains.

Mizuno JPX 800 Irons | Mizuno JPX 800 Pro Irons

The Mizuno JPX 800 irons were introduced as the ultimate game-improvement irons. These Mizuno irons made a splash in the market because they’re geared towards the average golfer, rather than the “better player.”

The main goal of the Mizuno JPX 800 irons is to gain you more distance. Not only does Mizuno help you achieve that technically with a Hot Metal clubface and Coefficient of Restitution (COR) technology, but also through aesthetics. Pro Tip # 7 - never underestimate the power of the confidence you receive from admiring the look of the golf club at address.

The Mizuno JPX 800 Pro irons of 2012 are forged, which would typically mean they’re made for the “better player.” The biggest difference with these Mizuno irons is the workability, though a thinner clubface does allow for a higher COR (and, therefore, more distance) than a typical set of irons.

Mizuno JPX 825 Irons | Mizuno JPX 825 Pro Irons

The 2013 Mizuno JPX 825 irons were released as a design improvement to the JPX 800 irons. Still game-improvement irons, the Mizuno JPX 825 irons balance forgiveness and workability, all while achieving optimal launch.

The Mizuno JPX 825 Pro irons of 2013, like its predecessors, are forged irons with a smaller club head. The clubface has an even lower center of gravity (CG) that allows for a higher launch and more distance. Even though forgiveness is still a big attribute here, this Mizuno iron set is geared towards lower handicappers.

Mizuno JPX 850 Irons | Mizuno JPX 850 Forged Irons

The Mizuno JPX 850 irons from 2015 continue to build on the earlier models. The key here is increased distance through a hotter clubface, which leads to higher ball speed. If you want to see what ball speed you should be aiming for with your irons, check out our launch monitor guide that covers all the need-to-know numbers. A shift in weight also gives these Mizuno irons more forgiveness than ever before.

Also released for 2015, the Mizuno JPX 850 Forged irons carry on the traditional forged iron feel and distance, enhanced by a stronger yet thinner clubface. The addition of the new Boron-and-steel combination makes the golf ball go further without any other design manipulations. The Power Frame design also adds a forgiveness aspect to these forged Mizuno irons.

Mizuno JPX 900 Hot Metal Irons | Mizuno JPX 900 Forged Irons | Mizuno JPX 900 Tour Irons

The 2017 releases included the Mizuno JPX 900 Hot Metal irons, the Mizuno JPX 900 Forged irons and the Mizuno JPX 900 Tour irons. These Hot Metal irons are more customizable in that the 1-Piece Cup Face and hosel and can be bent to fit your swing without losing any clubface strength. When combined with the Power Frame design, forgiveness is at its highest.

The JPX 900 Forged irons combine several technologies, including the Grain Flow Forging found in all of Mizuno’s JPX forged irons to date, to create the most stable Mizuno forged irons yet. Unlike most forged irons, these include the Power Frame design to optimize forgiveness.

The JPX 900 Tour irons are blades geared toward lower handicaps. The blade construction, combined with the Power Frame design, once again creates more stability and forgiveness, which is also appreciated when hitting blade irons. These irons also have a smaller club head than the other JPX 900 models. Fun fact: these are the irons Brooks Koepka used to win two major championships in 2018.

Mizuno JPX 919 Hot Metal & Hot Metal Pro Irons | Mizuno JPX 919 Tour Irons | Mizuno JPX 919 Forged Irons

2019 saw the release of the Mizuno JPX 919 irons, which come in several different builds. The Mizuno JPX 919 Hot Metal irons may look like its predecessors but have advanced technology to make the golf ball go further, higher and straighter. No matter your handicap, these Mizuno irons provide distance. If you are a lower handicap and want to take your distance a step further, the Mizuno JPX 919 Hot Metal Pro irons are for you.

The compact design of the Mizuno JPX 919 Tour irons was solely focused on improved accuracy and workability. While there is some added stability, if you want to shape each shot and have the skills to do it, you should take a look at these irons.

The Mizuno JPX 919 Forged irons are a solid option for everyone’s game. Unless you’re looking to add major distance or accuracy and control specifically (see above), these forged Mizuno irons are a winner. They are aesthetically pleasing and still contain the technology that increases ball speeds off the clubface.

Mizuno JPX 921 Forged Irons | Mizuno JPX 921 Hot Metal & Hot Metal Pro Irons | Mizuno JPX 921 Tour Irons

The Mizuno JPX 921 irons were released for 2021, and the Mizuno JPX 921 Forged irons are a wonder. Not only are they the first forged irons to use Chromoly, Mizuno’s super-strong material, but they are also more forgiving than the JPX 919 Forged irons despite having an even more compact club head.

The Mizuno JPX 921 Hot Metal irons continue to be aesthetically pleasing at address with a larger club head, making these the leading game-improvement irons in this line. The Mizuno JPX 921 Hot Metal Pro irons, however, have a smaller club head, a faster COR (Coefficient of Restitution) thanks to the use of Chromoly and a higher capacity to control and shape shots.

Last, but certainly not least, are the Mizuno JPX 921 Tour irons. This version of irons more closely resembles Mizuno’s MP family, which we’ll be diving into next. This means that accuracy, workability and consistency are priorities in this design, though the distance gain is nothing to frown at either.

The Mizuno MP H4 and MP H5 Irons Are for Mid Handicappers

The Mizuno MP H4 irons were a groundbreaking concept at Mizuno Golf. They took the designs from the MP irons lines and the JPX iron lines to make an elite game-improvement iron line. Frankly, these Mizuno irons are specifically for mid handicappers.

Mizuno MP H4 Irons

The Mizuno MP H4 irons seem like a dream. Their shorter irons are designed for greater accuracy, their mid irons are geared towards forgiveness and their longer irons have increased launch assistance. On top of the customization, the Mizuno MP H4 irons have a pure feel and are forged and consistent throughout the “mixed” set.

Mizuno MP H5 Irons

The 2014 Mizuno MP H5 irons follow a similar set breakdown as the MP H4 irons, though their overall design aims for an increase in distance control. This is achieved through a higher launch and a lower spin thanks to a lower center of gravity (CG). The club head also sports a “Hollow Construction” for consistency and optimal launch capabilities.

The evolution of Mizuno irons has seen an increase in valuable technology. Their market has also expanded to truly cover every handicap. The Mizuno JPX 921 irons and MP H5 irons are the latest models in their lines, though Mizuno Golf has a promising future for every type of player.