Mizuno Introduces JPX-800 Series Irons

Mizuno ushers in a new era of performance game improvement irons built with the combined skill of their club designers from Japan, Europe, and the U.S.

Bag DropHow do you improve on one of the more popular game improvement lines of the past few years? If you’re Mizuno, you don’t – instead, you pull all the great ideas and technology from your assets around the world, and build something new.

Some may mourn the loss of Mizuno’s MX line (myself included, the MX-300s are still seeing heavy rotation in my bag, and I don’t plan on changing anytime soon), but after taking a look at the new JPX-800 and JPX-800 Pro there’s a good chance those feelings will change. The JPX line, in fact, is set to be Mizuno’s global (as in, not U.S. or Japan only, as we’ve seen in the past) brand of game improvement gear, and becomes the newest complement to the award winning MP line.

Before we get into the details and minutiae of both the JPX-800 and JPX-800 Pro irons, kicking this week off is a quote from Mizuno’s Marketing Communication Manager, Iver Maple, about the new JPX brand in general:

The BIG story is our launching a new brand in the game improvement category, JPX, with two new irons, the JPX-800 and the JPX-800 Pro. This is our biggest commitment yet to the Game Improvement category, and the product is unbelievable. We think it could be a “game changer.” We have combined all of our R&D capabilities from Japan, Europe, and the U.S. to put every possible technology into these irons and launch it as a GLOBAL brand.

Iver Maple, Marketing Communication Manager

Mizuno JPX-800 Irons
Leading off this new line is the JPX-800 irons. Mizuno’s engineers had two primary goals in mind when designing these irons – first, make them very forgiving, and second, make them extremely long. To achieve these distance goals, they included components such as MAX COR Technology, Hot Metal face construction, and an “exotic” pocket cavity. This explosive combination takes the JPX-800 irons to the maximum legal limits for energy transfer, making them the hottest irons Mizuno has ever produced.

Mizuno JPX-800

Mizuno’s venerable Hot Metal construction has undergone some enhancements this year, as it now makes use of a new manufacturing process in which the material’s natural strength is increased, allowing for a reduction in the face thickness. This ultra-thin face leads to a greater “trampoline effect” (for lack of a better description), and ultimately greater distances. This new pocket cavity design and external power bar expands and extends the sweet spot, and also helps to locate the center of gravity low and deep, further promoting extreme forgiveness. The final product is Mizuno’s most forgiving and longest iron ever made.

Mizuno JPX-800

The JPX-800 isn’t just a one-trick pony though; distance and forgiveness weren’t the only thing they had in mind when designing them. Thanks to an aggressive triple-cut sole, the JPX-800 should make for solid ball-striking, regardless of lie. On the back side is a multi-material cavity badge, which assists in tuning the sound and feel that existing Mizuno customers have come to expect, and new customers will love. Finishing it all off is a durable double nickel chrome plating finish.

Mizuno JPX-800

Mizuno has always made very good game improvement irons, but we’ve mostly been recognized for our MP line of game enhancement products. JPX is by far Mizuno’s strongest global commitment to the game improvement category, and we took dead aim at our competitors to beat them in every category of game improvement performance, especially distance and forgiveness. The JPX-800 is truly an incredible iron, and players are going to be blown away by the distance gains they’ll experience versus whatever iron they are currently playing.

David Llewellyn, Golf Club R&D Manager, Mizuno USA

Options and Availability
The standard set contains a 4I up through a gap wedge, and comes with your choice of either steel or graphite shafts. The stock shaft is the True Temper Dynalite Gold XP (available in R300 and S300), while the graphite option is Mizuno’s Exsar IS4 (offered only in R flex). The stock grip is the tried and true Mizuno/Golf Pride M-21 58 Round. Of course, all of this can be customized to meet your needs – Mizuno’s Custom Club department is only a phone call away. Both left handed and right handed models will are available. MSRP is set at $699.99 for steel shafted models, and $899.99 for graphite.

Mizuno JPX-800 Pro
If you like what the JPX-800 has to offer but you’re looking for something with a littler more control, in maybe a slightly smaller package, the JPX-800 Pro might be just what you’re looking for – especially if you’re not quite ready to step up to Mizuno’s MP line.

Mizuno JPX-800 Pro

Featuring the largest sweet spot ever in a Mizuno Grain Flow Forged iron, the new JPX-800 Pro promotes distance and forgiveness though maintains a smaller, and more workable profile. We’ll get to that part in a minute, but for starters, you should know that the JPX-800 Pro screams distance, as it clocks in with the highest CoR values ever in a single piece Grain Flow Forged iron.

Mizuno JPX-800 Pro

So how does it achieve this? First, a large cavity is carved into the soft 1025 “Pure Select” mild carbon steel using a CNC milling process that thins the face, which in turn leads to a greater rebound effect and an increase in ball speed off of the face. This process also works by creating a lower, deeper, more optimal CG for more consistency on off center contact.

Mizuno JPX-800 Pro

As to be expected, Mizuno paid attention to how the final product sounds and feels, as they have a long standing reputation for creating some of the softest, most consistent feeling irons on the market. This is accomplished not only by the Grain Flow Forging process, but also via the use of Modal Analysis and Harmonic Impact Technology.

Mizuno JPX-800 Pro

In terms of size, the JPX-800 Pro has a smaller, more workable head than the standard JPX-800 and has a thinner topline, as well as less offset. Like it’s larger sibling though, the Pro model employs an aggressive Triple Cut sole design, making it easy to take into just about any lie.

For the player looking for distance and forgiveness, but also the unmatched soft, solid feel of a Grain Flow Forged iron, the JPX-800 Pro is a match made in heaven. With the JPX-800 Pro the player is really getting the best of all worlds. Increased ball speeds are going to provide the extra yards all players are looking for, and the low and deep center of gravity will help greatly on less than perfect shots. And with all of that, they feel better than any other game improvement iron out there.

David Llewellyn

Options and Availability
Sorry lefties, you’re left out on this one – the JPX-800 Pro is available for right handed players only. The stock shaft is the steel True Temper Dynalite Gold XP (in either R300 or S300), and is capped off with the Mizuno/Golf Pride M-21 58 Round grip. The standard set contains 4I-GW and will run you $799.99. Of course if you need something other than standard shaft or grip, or if you need alterations to length and lie, Mizuno’s Custom Club department can get you taken care of. If you decide to get fitted by your local retailer, be sure to ask if Mizuno’s Performance Fitting System can be used.

Stay tuned, as next week, we’ll be checking out the rest of Mizuno’s new releases. See ya then!

8 thoughts on “Mizuno Introduces JPX-800 Series Irons”

  1. The last “very good” GI iron Mizuno made was the MX-19. I see design improvements here over their recent offerings… weight further out from the hosel for one. My worry is how high the center of gravity is going to be with the bulky and unnecessary badge in the cavity.

  2. yes of course ben, because im sure mizuno tested the CG of the iron and then added that extra 5 grams of plastic onto it with out realizing it would have and effect on the play of the club. besides, compared to your standard GI irons this club is quite the minimalist when it comes to decals. ive got a half set of mp 68 and mp 57 in my bag right now and im thinking about moving to the pro before college. hopefully a review will be coming soon?

  3. I currently have the MX-19s and had considered upgrading to the MX-300s in a couple years when I can justify doing so (both skill-wise and financially). I wonder how the JPX series is going to affect the used sale prices of the MX series, and if it might be a better idea to instead switch to the JPX series.

    Can’t wait to hear user testimonials.

    Unfortunately, the design on the back is more busy than I prefer. I really liked the simplicity Mizuno maintained with the MX series, like the MX-25s and even MX-300s. But as long as it’s hidden at address, it doesn’t matter a lot.

  4. Have been playing pings and callaways, but always seem to drift back to my old 845’s because of the thinner topline, smaller offset and turf interaction. Have been thinking of trying a switch to Mizuno and was looking at the mx300 line until reading about the J series. Which Mizuno would give me the visual and turf feedback of the 845’s, yet have all the technology and the improvments found in the modern irons? Thanks, David O 15HCP

  5. Hit both demos of 800 and pro at the range, fell in love right away with the pro.
    Bought the Pro, played it today.
    Wow! they are bulleyes on what Mizuno says about the pro.
    Distance is longer for me, love the trajectory of at least the 5, 6, 9, PW irons. I have not hit the others irons yet, did not need it today. The feel is just perfect for me.
    I had the lowest score from the last 3 weeks of play with the pro.
    This is a keeper!

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