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IronsMizuno IronsMizuno Pro M-15, M-13, S-3, S-1 and MX FORGED
Updated: Nov 2, 2026Contains affiliate links
Choose Mizuno irons by name alone and you can end up with something other than what you expected. Within "Mizuno Pro" alone, 7-iron lofts range 5°, from 29° to 34°. The 7-iron is 29° on the M-15, 30° on the MX FORGED, 32° on the M-13 and 34° on the S-1 and S-3. Line up the numbers and you can see at a glance which lean toward distance and which toward control.
Hit: I used the Mizuno Pro M-15 in October and hit its 7-iron for 20 balls indoors and also on the course. The 7-iron is labeled 29 degrees and measured 28.5. At 46 m/s of clubhead speed it carried 164 yards with 5,900 rpm of spin, about 4 yards farther than the 7-iron of the ZXi5 I used for comparison (31 degrees, 160 yards). I hit the S-3's 7-iron for 10 balls in a hitting bay, and I only held the MX FORGED, M-13 and S-1 in a store.
Rakuten Ichiba / AdMizuno Pro M-15
Rakuten Ichiba / AdMX FORGED
Rakuten Ichiba / AdMizuno Pro M-13
Product images: Rakuten Ichiba (ad). Click an image to go to the Rakuten Ichiba sales page. Check price and stock on the sales page.
In this article
Bottom line: how I'd choose
The 7-iron is 29° on the M-15, 30° on the MX FORGED, 32° on the M-13 and 34° on the S-1 and S-3. The further left, the more distance and forgiveness; the further right, the more workability.
If you can't choose between the S-1 and S-3, I'd point you to the S-3 first. Loft and price are the same. On top of that, the S-3 keeps a little cavity for added resistance to mishits. The muscle-back S-1 is for golfers confident of striking the center.
To try forged soft iron cheaply, the MX FORGED (5-club set, ¥121,000).
Irons: even within Mizuno Pro, the 7-iron runs from 29° to 34°
| Model | Release date | Construction | 7-iron loft | PW loft | Set price (incl. tax) |
|---|---|---|---|---|---|
| Rakuten Ichiba / AdMizuno Pro M-15 | Aug 29, 2025 | Hollow in the 4 to 8-iron, semi-hollow in the 9-iron to GW | 29 deg | 43° | 6-club set (#5 to PW) ¥165,000 |
| Rakuten Ichiba / AdMX FORGED | Jun 5, 2026 | One-piece forged soft carbon steel, cavity back | 30 deg | 44 deg | 5-club set (#6 to PW) ¥121,000 |
| Rakuten Ichiba / AdMizuno Pro M-13 | Aug 29, 2025 | Club-by-club design (cavity in the long irons, one-piece forged soft iron in the 9-iron to GW) | 32° | 44 deg | 6-club set (#5 to PW) ¥165,000 |
| Mizuno Pro S-3 | Mar 7, 2025 | Forged soft iron, half cavity | 34° | 46 deg | 6-club set (#5 to PW) ¥151,800 |
| Mizuno Pro S-1 | Aug 29, 2025 | Forged soft iron, muscle-back | 34° | 46 deg | 6-club set (#5 to PW) ¥151,800 |
The M-15 and S-1 differ by 5° in 7-iron loft. 5° is about one full club. Even under the same "Mizuno Pro 7-iron", the M-15's 7-iron is close to the S-1's 6-iron.
The M-13 and M-15 use a "club-by-club design" that changes construction and material by club. The long irons are built to resist mishits, the short irons for feel and workability.
The S-1 and S-3 have the same loft in every club (27° for the 5-iron to 46° for the PW) and the same set price of ¥151,800. The difference is that the S-1 is a muscle back and the S-3 is a half cavity that keeps a little cavity.
The MX FORGED is a 5-club set (6-iron to PW), so don't compare its price directly with the 6-club Mizuno Pro sets. Per club, the MX FORGED is ¥24,200 and the 6-club Mizuno Pro sets are ¥25,300 to ¥27,500.
What I found by using: the M-15 7-iron measured 28.5 degrees and carried about 4 yards farther than the ZXi5
I compared the labeled and measured loft on the M-15's 7-iron. The 29 degrees on the label came out at 28.5 degrees, almost exactly the official number. The gap between 29 and 34 degrees showed up in distance just as this article says.
On the sweet spot the sound is a low, short "kok", and the ball seems to sit on the face before it leaves. On a miss the sound gets a little higher and a hardness stays in my hands. The Srixon ZXi5 sounded dry and low, the Titleist T100 was firmer, and the PING rang a little.
I hit the S-3's 7-iron for 10 balls. When I missed the center, I lost about 7 yards and the ball curved 6 yards to the right. It is a little less forgiving than the M-15 and feels close to the ZX5 Mk II. I only held the S-1 in a store.
I worked out the link to the wedges with numbers. With the M-15's 29-degree 7-iron, the PW is 43 degrees. My own set has a 46-degree PW and 50- and 54-degree wedges, and the gap in distance is about 17 yards. With the M-15's PW the gap would widen to about 25 yards, so I would add a 47-degree wedge.
In October I went to a Mizuno demo day. The shaft was N.S.PRO MODUS3 TOUR 120 S (about 120 g), and I hit a few balls with Dynamic Gold. The length was the standard 37 inches and I made no adjustments.
What I noticed is that the feel at the center stays consistent and the distance steps line up neatly. I agree with this article's advice to recommend the S-3 first: it is not as harsh as a muscle-back, and you still get Mizuno's feel.
I saw the M-15 listed for the 90,000-yen range at a big online used-club store, against 165,000 yen for a new six-club set. I put renting first, before buying. Start by hitting ten 7-irons.
Before you buy last year's model: how it differs from the one before
| Current | Previous model | Difference in numbers |
|---|---|---|
| Mizuno Pro M-15 | Mizuno Pro 245 | About 8% larger high-ball-speed area in the 4 to 8-iron (official) |
| Mizuno Pro M-13 | Mizuno Pro 243 | Thinner face in the 6 to 8-iron (no figure published) |
| Mizuno Pro S-1 | Mizuno Pro 241 | Enlarged toe side and a changed sole shape (no figure published) |
| MX FORGED | JPX 925 FORGED | PW 43° to 44°, #9 38° to 39°. 5-club set ¥126,500 to ¥121,000 |
On the MX FORGED, compared with the earlier model, the short irons have 1° more loft and the price is ¥5,500 lower. It's an example showing newer doesn't always mean pricier or stronger-lofted.
FAQ
Which Mizuno Pro irons are the most forgiving?
The M-15 (29°, hollow construction), with the strongest 7-iron loft, leans toward distance and forgiveness. The M-13 (32°) is in the middle, and the S-3 and S-1 (34°, forged soft iron) lean toward workability and feel.
What's the difference between the Mizuno Pro S-1 and S-3?
Loft is the same in every club, and the 6-club set price is the same ¥151,800. The S-1 is a muscle back, and the S-3 is a half cavity that keeps a little cavity, so the S-3 adds a bit more resistance to mishits.
Other Mizuno clubs
Mizuno JPX ONE Driver vs SELECT
Mizuno Putters Compared: M.CRAFT 3 Series
Irons from other makers
- TaylorMade Irons Compared: 7-Iron Lofts Run 28–33°
- Callaway Irons Compared: 7-Iron Lofts Run 28–33°
- PING Irons Compared: 7-Iron Lofts Run 28–33°
- Titleist Irons Compared: 7-Iron Lofts Run 29–35°
- Srixon and XXIO Irons Compared: 7-Iron Lofts Run 28–33°
Read these before you choose, so you don't get stuck
How Many Wedges? | Look Up Your PW Loft First
Sources for this article
- Mizuno Golf official news list
- Mizuno news release: M-13, M-15, S-1 (Aug 21, 2025)
- Mizuno Pro special page
- M-13 official online (loft by club)
- M-15 official online (loft by club)
- S-1 official online (loft by club)
- Mizuno news release: S-3 (Feb 5, 2025)
- S-3 official online (loft by club)
- MX FORGED official online
- MX FORGED explainer (Sportsnavi)
- JPX 925 FORGED official online
About the writer and how this page was made
A golfer who averages a 72 over about 150 rounds a year went through the gear documents one by one.
This page is not a hands-on impression. It is a list of official figures from the makers. The sources of the figures are listed at the end of the page. Check price and stock on each shop's page before you buy.