Sophie Walker

Mizuno irons are so good that it could simply change the name of it's models every couple of years and re-release them, and they'd still look and perform really well.

So when the Japanese manufacturer decides to make bigger changes to the development and makeup of their irons, you know that they've done exhaustive testing to ensure that they are going to help you improve on the course.

Mizuno JPX921 Forged Irons

The 'Forged' line of the JPX iron range has long held the middle ground in the series, as it gives you a sleek appearance and excellent feel with a little more help than the Tour model. For the new JPX921 series, Mizuno are heating things up...

What's It All About?

The JPX921 Forged is the first iron of this type to be crafted from Mizuno's Chromoly steel - after it was first used in the Hot Metal irons - and the brand says that this has provided their fastest ball speeds ever produced from a forged iron as it allows the clubface to be up to 0.5mm thinner than their previous models.

Mizuno JPX921 Forged Irons

Additional weighting has also been added towards the perimeter of the club head, particularly in the toe, which creates a 'Stability Frame' to give you a little better forgiveness on off-centre strikes.

Mizuno JPX921 Forged Irons

The Forged irons still feature a sleek, compact profile however, with a shorter blade length and reduced offset to give the look and feel of a classic forged iron, particularly as you move down the set towards the scoring clubs.

The Test

I hit the JPX921 Forged using Trackman 4 and Titleist Pro V1x balls in my simulator at Mercedes Benz, LSH Auto. I wanted to collect data on the numbers produced by the irons as well as reporting on the sound and feel.

Mizuno JPX921 Forged Irons

Do they provide a similar soft feel and workability to the Tour model, but with a little extra forgiveness for single-figure golfers?

Mizuno JPX921 Forged Iron Review

Looks and Feel

The Forged iron looks equally as sexy as the Tour model, with a slightly larger head shape but the same pearl brushed steel which looks much better than shiny steel as it reduces glare in the sun.

Mizuno JPX921 Forged Irons

It's more compact than the JPX919 model with a little less offset too, whilst a bevelled trailing edge helps to underline the sleeker look.

Mizuno JPX921 Forged Irons

These irons feel fast and soft (and yes, you can have both) and I really enjoyed using the lighter Nippon shaft, which was similar to those I used for many years whilst playing on Tour. Add to this a multi-compound Golf Pride grip and these irons were becoming the perfect fit and feel for a golfer like me.


Numbers-wise, the Forged irons didn't perform much differently than the Tour model but a closer look at the data shows that they flew straighter on average, and with a little less right to left spin so perhaps I wasn't having to work quite as hard to get them going.

Mizuno JPX921 Forged Irons

With the 5 iron, the ball speed and launch were a little higher but there's still not a great deal of forgiveness if you really mi-hit one, with the carry distance dropping right down to around 150 yards which would miss most greens short.

Mizuno JPX921 Forged Irons

Throughout the set the overall carry yardages for these irons were around 5 yards shorter than I would ideally like, but for a Forged iron that has relatively standard lofts (for example, the 7 iron is 31 degrees) I was pleasantly surprised.

Mizuno JPX921 Forged Irons

It turns out I was getting the accuracy and feel that I wanted and only losing a few yards carry. The blade didn’t want to turn over through the strike as much as the Tour model and I could feel more stability.

Sophie's Numbers

Mizuno JPX921 Forged Irons

Mizuno JPX921 Forged Iron Verdict

All in all, the JPX921 Forged irons looked beautiful and performed really well. They suited me a little better than the Tour model, although I'd say that the longer irons were still a little thin for me and they aren't the easiest to strike consistently. I would certainly look to have the short irons feature in the bottom of my bag from wedge up to around 6 iron.

Mizuno JPX921 Forged Irons

Even though the lofts are still a little stronger than a normal forged Mizuno iron, the spin rates were still plenty high enough to get the stop on the greens, and I think this gives you a little more confidence, especially when hitting into tight greens if the greens are firm.

Mizuno JPX921 Forged Irons

This accuracy, combined with decent carry numbers, is enough to convince me that these irons would be great for someone who is looking to drop down from a cast cavity-back iron to a forged model, but who isn't brave enough to go for a full blade.


  • Looked slick at address
  • Sounds and feels like a Mizuno should
  • Very accurate


  • Low lofts which aren't to the liking of some golfers

If you enjoyed this, you may also like:

TaylorMade P7MC Irons Review

Mizuno JPX921 Tour Irons Review

Golfalot Rating: 5 stars
More from Mizuno


Mizuno JPX921 Forged Iron

Mizuno JPX921 Forged Irons - Product Details

UK Launch17 September 2020
UK Launch RRP£1050
Handicap Range
Hand AvailabilityLeft, Right
DesignCavity Back
Set Makeup4, 5, 6, 7, 8, 9, PW
Additional ClubsGW
Manufacturer's WebsiteMizuno Website

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