Mizuno JPX One Driver Specifications
Stock lofts for every Mizuno JPX One head and the full hosel adjustment chart, 2026–present.
- Years produced
- 2026–present
- Category
- Flagship Driver Line
- Head variants
- Std, Select
- Loft range
- 9°–12°
- Head size
- 460 cc
- Hosel
- Quick Switch · ±2°
Stock lofts by head variant
| Head | Stock lofts | Head size | Lie (°) | Length (in) |
|---|---|---|---|---|
| JPX One | 9°, 10.5°, 12° | 460 cc | 59 | 45.75 |
| JPX One Select | 9°, 10.5° | 460 cc | 56.5 | 45.75 |
Lofts are the stamped stock options for each head, factory standard. The hosel chart below shows how far each can be adjusted from its stamped loft.
Hosel adjustment chart
Quick Switch · loft ±2°.
Mizuno's published ranges run from the stated lie to 3° upright (JPX One 59-62°, Select 56.5-59.5°). Lowering loft opens the face and raising it closes it, as on any hosel-based adjuster.
Mizuno publishes the Quick Switch range per head — a 9° head plays 7-11°, a 10.5° head 8.5-12.5°, a 12° head 10-14° — but does not publish a position-by-position chart online, so none is reproduced here. The anchors Mizuno does state: the standard setting plays the stamped loft at the stated lie, the extremes sit 2° either side, and the upright positions add up to 3° of lie.
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Lofts at a glance
About the Mizuno JPX One
The JPX One is Mizuno's 2026 driver line, launched in January 2026 and the first to revive the JPX name for metalwoods. Its claim to a world first is the NANOALLOY face, co-developed with Toray: polymer dispersed through the titanium at microscopic level changes the face's elasticity at impact, paired with a CORTECH face map up to 0.35 mm thinner than the ST-MAX 230's and a COR area more than 15% larger. The standard JPX One is the larger-footprint, higher-MOI head built for straight flight; the JPX One Select is the compact, tour-inspired head with a shorter blade length, neutral-to-fade bias and roughly 1,100 rpm less spin in independent testing. A women's 12° build with the UST Helium NanoCore 4 is sold alongside.
Head variants
The heads this family is sold in, with each one’s stock loft options.
- JPX One9°, 10.5°, 12°
- The larger-footprint, higher-MOI head of the pair — built for stability and straighter flight. The 9° and 12° heads are right-hand only.
- JPX One Select9°, 10.5°
- The compact, tour-inspired head: reduced topline and blade length, neutral-to-fade bias, a flatter 56.5° lie and a more penetrating, lower-spinning flight. 10.5° is right-hand only.
Stock shafts
- Mitsubishi Tensei 1K Blue — graphite · 55-65g · flexes: R, S
- Mitsubishi Tensei 1K Black — graphite · 65-75g · flexes: R, S, X
- True Temper Denali Frost Blue 60 — graphite
Related models
Driver loft guides
How to pick between these stock lofts:
Frequently asked questions
What lofts does the Mizuno JPX One come in?
The standard JPX One comes in 9, 10.5 and 12 degrees (9 and 12 right-hand only); the JPX One Select in 9 and 10.5 (10.5 right-hand only). The Quick Switch hosel extends each head 2 degrees either way.
What are the JPX One loft settings?
Mizuno's Quick Switch hosel adjusts loft 2 degrees either side of stamped — a 9 degree head plays 7 to 11 degrees, a 10.5 plays 8.5 to 12.5 — and lie from standard up to 3 degrees upright. Mizuno does not publish a position-by-position chart, only these ranges.
What is the NANOALLOY face on the JPX One?
A world-first face material co-developed with Toray: polymer dispersed through the titanium at a microscopic level changes how the face flexes at impact. Combined with a thinner CORTECH face map, Mizuno claims a COR area more than 15% larger than the ST-MAX 230's.
What is the difference between the JPX One and JPX One Select?
The standard head is larger-profiled and higher-MOI for straight flight at a 59 degree lie; the Select is compact and tour-inspired with a flatter 56.5 degree lie, neutral-to-fade bias and roughly 1,100 rpm less spin in independent testing.
Where it sits in the lineup
Introduced in 2026, the Mizuno JPX One is the current Mizuno driver line as of October 2026, with no replacement announced. It replaced the Mizuno ST-MAX 230. New heads are sold in the stock lofts charted above; the hosel settings extend each head beyond its stamped loft, so a loft between two stock options is usually reachable from either. Before buying used, check the stamped loft against the chart above and ask which hosel setting it is in — an adjustable driver may be set a degree or more away from the number on the sole, and sleeve adapters are brand- and generation-specific.
- Mizuno JPX One official club specification table (lofts, loft and lie adjustment ranges, 460 cc, 45.75 inch, hand availability for both heads), mizunogolf.com, accessed October 2026
- Mizuno 'world's first NanoAlloy driver' technology article (Toray co-development, CORTECH 0.35 mm thinner, COR area 15% larger than ST-MAX), mizunogolf.com, accessed October 2026
- Golfalot JPX One and JPX One Select reviews (22 January 2026 UK launch, 11 g back weight, spin comparison, stock shafts), golfalot.com, accessed October 2026
- Note: Mizuno publishes no position-by-position Quick Switch chart, so only the official ranges are stated here. US retail of the standard head's 12° loft was patchy at launch — it appears on Mizuno's spec table as right-hand only.
Last updated 23 October 2026. Spot an error? info@loftchart.com