MIzuno JPX 925 Forged Iron Information – Updates with Photos

Updated 10/3/2024 – added info about full face grooves on gap and sand wedge

Updated 10/7/2024 – added info on offset (same as 923 Forged)

As someone who plays the Mizuno JPX 923 Forged irons, I’m excited to find information about the JPX 925 Forged irons.

Rumors are that information won’t be made public in the US until January 2025 with a planned release in February 2025.  However, it looks like they are already released in Japan.  Some information I’ve found is translated from Japanese and some is on English websites.

The biggest change seems to be the use of the Contour Ellipse Face design, which thickens the center of the face and gradually thins it towards the edges. This design allows for greater flex at impact, resulting in faster, more powerful strikes. The new face is 33% thinner than previous models, which should increase distance.  Most people who have tested the irons report an increase in distance.

The other new feature is referred to as a “Full Pocket Cavity” which also increases the sweet spot, improving ball speed even on off center hits.

The JPS 925 Forged appear to continue to be grain flow forged HD with 4120 chromoly in the 5, 6, and 7 iron, with 1025e pure select mild carbon steel forged 8 through gap wedge, unchanged from the JPX 923 Forged.

I’ve attached a screen shot of the specs I found online, which interestingly are slightly different from the 923 Forged. The 9, PW, and GW are each 1 degree stronger at 39, 44, and 48 degrees respectively.  Also, each club appears to be 1/2 degree more upright.  Mizuno traditionally have been slightly flatter lies than other manufacturers.  I don’t know if these specs will be the same for the US launch of the irons.

I will continue to update with images and information as it becomes available.

I found an image comparing the face thickness of the 923 Forged vs the 925 Forged:

Based on the image, it appears the 923 Forged had sections of different thickness either 2.2mm at the center, 2.3mm along the bottom and toe, and 2.5mm along the top area.  The 925 Forged appears to have variable thickness in oval shapes around the center, referred to as the Contour Ellipse Face, with the center thickness being 2.1 mm and then getting thinner to a region that is as thin as 1.5 mm and then it gets thicker again to 2.3 mm in the outermost area.  The variable face thickness is designed to maximize speed in the center while also retaining speed when hit off center.  This should help reduce distance dispersion.  I’ve found the 923 Forged has been pretty good distance consistency throughout the face, so impressive if they have made further improvement there.

The Japanese text translates to “Hollow Department” which must be referring to their new “Full Pocket Cavity”.  The hollow section along the sole of the club is what appears to be new.  The 923 Forged had a cavity behind the face, but it did not extend down along the sole.  I’ll be curious to read more about this when information is available.  It seems contrary to most game improvement irons which add additional weight along the bottom, often using tungsten.  The image also specifies on the 5-7 irons, which again, you’d think that extra weight along the bottom would be beneficial for getting long irons up in the air.

This image seems to suggest there is a two piece construction, at least for the 5-7 irons.  The Japanese translates to “chrome molybdenum” (chromoly) for the top image pointing to the back of the face, which is the SCM420 alloy.  The lower back portion Japanese translates to “stainless steel”, which is also labeled  SUS431.

I found more specifics on the offset, and I’ve seen some sights saying the gap wedge is 49 degrees, and other places have it as 48. The offset is exactly the same as the JPX 923 Forged, with 0.5 degree more upright lie angle on the 925.

And here is the 925 Forged spces:

I found information available on the Mizuno Hong Kong website.