Dan Box
By Dan Box

Here at Golfalot HQ we get very excited when details of new Mizuno irons get dropped into our inbox, and just one look at the new JPX921 range is enough to see why.

Mizuno JPX921 Irons

The Japanese manufacturer are famed for producing irons which look great and perform brilliantly, as we saw with the previous JPX919 range and last year's MP-20 irons, and this year's offering looks like it's going to be no different.

We're all queuing up for a chance to hit these beauties!

The JPX iron range from Mizuno shot back into prominence when they were used by Brooks Koepka on his way to compiling four major wins in the last three years, and he picked the JPX919 Tour out of all other possible iron models as he was not contracted to play with them - proving that they really are among the best on the market.

The new JPX921 range is comprised of JPX921 Forged, JPX921 Tour and JPX921 Hot Metal and Hot Metal Pro. Mizuno says that the series has been engineered with one thing in mind - to improve on-course performance for golfers - and features the use of Chromoly (first seen in the MP-20 range) in a full forged iron for the very first time.

"Applying the potential of Chromoly means that the JPX921 irons hold their own in any simulator test - without having to crank 7 iron lofts at all cost. Look, feel, launch, spin and landing angles have to be right through the set - ultimately this is what sets Mizuno irons apart."

  • David Llewellyn, Director of R&D for Mizuno.

JPX921 Forged Irons

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 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 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 classical forged iron, particularly as you move down the set towards the scoring clubs.

The JPX921 Forged are available from 4-GW and priced at £150 per iron.

JPX921 Tour Irons

The Tour model is the most popular Mizuno iron used by non-contracted players on the PGA Tour, most notably by Brooks Koepka to win back to back US Opens and PGA Championships.

Mizuno JPX921 Irons

The new JPX921 Tour iron is said to continue providing a combination of precision with stability on off-centre strikes. They've made it slightly thicker behind the face to give a slightly softer feel, and refined the short irons for better turf interaction and more precision going into the greens.

It features the same Stability Frame with toe bias weighting to promote a longer, straighter and more consistent ball flight.

Mizuno JPX921 Irons

The short irons' narrower sole improves the turf interaction, and a thicker cavity pad comes as a result of Mizuno's work on vibration patterns which produces a better feel that can be felt for a little longer.

The JPX921 Tour features a pearl brush, anti-glare finish to get rid of distractions over the ball and is priced at £150 per iron, available between 4-GW.

JPX921 Hot Metal and Hot Metal Pro Irons

Mizuno say that the new Hot Metal and Hot Metal Pro irons deliver their fastest ever ball speeds, with a straight ball flight and 'controllable' landing angles.

Mizuno JPX921 Irons

This is the third time that Hot Metal irons have used Chromoly, and Mizuno's R&D suggests that any new technology needs three iterations to achieve optimal performance, so these should be the best yet!

The Hot Metal Pro version offers a slightly more compact profile, with a little less offset, whilst both iron models feature new complex face geometry to generate better energy from the clubface.

Mizuno JPX921 Irons

The Seamless Cup Face has a variable thickness sole design, which allows the leading edge to act as a hinge and produces greater flex.

The Hot Metal irons are priced at £120 per club, and the Hot Metal Pro irons at £135 per club. Both are available in 4-GW.

If you enjoyed this, you may also like:

Mizuno MP-20 MMC Irons Review

Mizuno JPX919 Forged Iron Review

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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