Mizuno has forged irons in the same Hiroshima, Japan facility since 1968, and Grain Flow Forging, patented in 1998, is the process behind nearly every iron the company makes, including the JPX line.
The forging process
Instead of casting a head in a mold, Grain Flow Forging shapes each head from a single piece of steel across multiple forging stages, keeping the metal's internal grain structure continuous through the head, hosel, and neck. That's part of why forged irons tend to feel softer at impact.
The JPX line
JPX launched around 2010 as Mizuno's more forgiving counterpart to the MP line, and the current JPX Forged models still use Grain Flow Forging while adding more distance-focused features aimed at a wider range of players.
Browse the Mizuno iron sets we currently have in stock, or see how it compares to TaylorMade's P790. If the shafts don't match your swing, we handle reshafting in house too.
