Mizuno JPX 921 Forged vs JPX 923 Forged: The Used Buyer's Comparison (2026)
Two of Mizuno's most-loved players-distance irons, both now excellent value second-hand. Here's what's actually different — and which one to buy used.
The JPX Forged line is where Mizuno's legendary Hiroshima forging meets real-world forgiveness, and the 921 and 923 generations are the sweet spot of the used market right now: modern enough to compete with anything, old enough to be seriously discounted. The differences between them are real but subtle — and one of them is a genuine change in how the sets are built. Here's the honest breakdown for second-hand buyers.
JPX 921 Forged vs JPX 923 Forged
| Feature | JPX 921 Forged (2020) | JPX 923 Forged (2022) |
|---|---|---|
| Construction | Mizuno's first fully-forged Chromoly iron — one-piece, full-body Chromoly 4120 across the whole set (4–GW), Grain Flow Forged HD in Hiroshima | Dual-material: 4–7 irons in 3rd-gen 4120 Chromoly with a wider back-milled micro-slot; 8-iron–GW switch to softer 1025E mild carbon steel for the scoring clubs |
| Face & speed | ~2.6mm face; fast for a one-piece forging and uniform across the set | Long-iron face thinned to ~2.2mm plus a wider micro-slot — a little more ball speed and forgiveness in the 4–7 |
| Feel | Consistent Chromoly feel from long iron to wedge — one material throughout, slightly hotter | Split by design: springy, hot Chromoly long irons and classically soft 1025E scoring irons |
| Looks | Clean, slightly fuller profile | Thinner topline and more compact scoring irons — most golfers call this the better-looking set |
| Used price | The value pick — often meaningfully cheaper | Commands a premium for the newer looks and the small long-iron gains |
The Real Difference: One Material vs Two
The headline distinction between these two generations isn't the face being a fraction thinner — it's the material makeup of the set.
- The 921 Forged is all Chromoly. Every iron, 4 through GW, is one-piece full-body Chromoly 4120. It was Mizuno's first forged Chromoly iron, and the feel is uniform right through the bag.
- The 923 Forged mixes two materials on purpose. The 4–7 irons stay Chromoly (thinner face, wider micro-slot) for speed and forgiveness where you want it most, while the 8-iron to gap wedge switch to soft 1025E mild carbon steel for control and that classic buttery Mizuno feel in the scoring zone.
That's why owners describe the 923's feel as changing subtly as they work down through the set — it's designed to. The 921, by contrast, feels the same character throughout.
What Owners of Both Actually Report
- The performance gap is small — the 923's gains are real but incremental. Nobody drops multiple shots switching from a 921.
- Both suit the same player — mid-handicappers wanting distance and forgiveness with forged feel, and better players wanting a bit of help in the long irons.
- The 923's scoring irons feel a touch softer thanks to the 1025E, while its long irons feel a touch hotter than the 921's — the dual-material payoff.
💡 Used-buying tip: Chromoly is harder to bend than standard 1025E forgings, so plan around it. On the 921 Forged the entire set is Chromoly, so buy the lofts and lies you actually want rather than banking on big adjustments later. On the 923 Forged only the 4–7 are Chromoly (less bend-friendly); the 8–GW are 1025E and adjust normally. Either way, confirm the exact shaft — these sets were sold with a wide range of options.
Why Buy From Us
Mizuno's Japanese heritage is exactly our specialty — we source premium used irons, including Japanese-market Mizuno gear that never reached Australian retail. Every set is professionally inspected and graded under our published grading system, with exact shaft, flex and set make-up listed. For the full story of the brand, read Mizuno irons through the years.
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Frequently Asked Questions
Is the JPX 923 Forged worth the upgrade over the 921 Forged?
Only incrementally. The 923 has a thinner topline, more compact scoring irons and a little more long-iron ball speed, but the performance jump is small. If budget leads, the 921 Forged is the value buy; if looks and the latest tech matter, the 923 justifies its premium.
Are the JPX 921 and 923 Forged the same material?
No. The 921 Forged is full-body Chromoly 4120 throughout the whole set. The 923 Forged uses Chromoly 4120 in the 4–7 irons and softer 1025E mild carbon steel in the 8-iron to gap wedge.
Which is better for a mid-handicapper?
Both suit mid-handicappers well — they're players-distance irons offering forged feel with genuine forgiveness. The 921 is the smarter value; the 923 is the pick if you want the sleeker look and slightly softer scoring irons.
Can JPX Forged irons be bent for loft and lie?
Chromoly is harder to bend than standard forged carbon steel. The 921 is all Chromoly, so buy the specs you want. On the 923, the 8–GW (1025E) bend normally while the 4–7 (Chromoly) are more resistant.
The Bottom Line
If budget leads, the JPX 921 Forged is one of the best value forged irons on the used market. If looks and the latest tech matter, the 923 justifies its premium with a sleeker shape and a smart dual-material build. Either way, you're getting Hiroshima forging at a fraction of new-set money.
Honest prices, quality gear. Simple.