Mizuno Runbird logo and wordmark in white on a black square

Mizuno and the Chuo Forge: Feel as Engineering

Mizuno is the oldest of the great Japanese golf names and the one that has done most to define what golfers abroad mean when they say a club feels “Japanese”: dense, soft and exact. The company is also, as this chapter of The Atlas of Japanese Golf sets out, a case study in how a Japanese maker can keep a signature while sharing its forging with others. The forge that shapes most Mizuno irons does not belong to Mizuno, and the people who finish them work in a town called Yōrō.

From Osaka to the first Japanese-made clubs

Mizuno was founded in Osaka in 1906 by Rihachi Mizuno and his younger brother Rizo, as Mizuno Brothers Ltd. It began with sporting goods generally and baseball in particular, making baseballs and gloves from 1913. Mizuno dates its first golf clubs, the Star Line, to 1933 and describes them as the first made in Japan, and one reference records that its golf showroom was reportedly the largest in the world by 1935. Both are the company’s own claims, repeated by later writers, and they are best read as such. What is beyond dispute is that Mizuno has been making golf clubs for more than ninety years.

The forge that is not Mizuno’s

The detail that most surprises newcomers is ownership. According to a 2018 profile by MyGolfSpy, the independent forging house Chuo has forged the great majority of Mizuno designs since 1968. Chuo does not sit under the Mizuno corporate umbrella. Most of its business is precision automotive parts, much of it forged for Mazda, and its relationship with Mizuno rests on a handshake rather than a contract. It is not exclusive to Mizuno, and it keeps the moulds for current and past Mizuno designs.

  • What this means. The consistency collectors prize in Mizuno irons comes from a long partnership between a brand and a specialist, not from a single factory floor.
  • The exceptions. The same profile of Epon records that Endo forged Mizuno’s JPX 800 AD and JPX 825 irons, among the few Mizuno forged irons made outside Chuo, because Mizuno lacked in-house capability for an undercut-cavity forged iron. See Epon and Endo.

Grain Flow Forging

Forging shapes a heated steel billet by pressing or hammering it into a head, and the argument for it is that the steel’s grain follows the shape of the part. Mizuno’s version, Grain Flow Forging, and its later HD form were developed through the Chuo partnership, and the patent is shared. In outline, the billet is stretched and bent before the primary forging so that the grain is arranged in advance. Mizuno credits the method for the feel behind its long-running slogan, “Nothing Feels Like a Mizuno.” The MyGolfSpy profile took a measured view, judging the benefit to be more a matter of feel than of measurable performance. Feel is, of course, what the buyer of a forged iron is paying for.

Yōrō: where the heads are finished

Mizuno Technics, in Yōrō, Gifu Prefecture, is the company’s research and craft centre. It houses a baseball factory, a wind tunnel, a ball cannon, a swing robot and a golf museum, along with Mizuno’s assembly for Asian markets and the Yoro Craft customisation service. Every MP club, the profile reports, passes through Yōrō, where craftsmen hand-shape heads designed on computer before the master mould is made from a digital rescan, and the site employs two Meister craftsmen.

The accurate description of a Mizuno MP iron is therefore a two-part one: forged at an independent partner, then hand-finished by Mizuno’s own craftsmen. That wording corrects the shorthand, still common, that Mizuno irons are “made in Yōrō”, and our Directory of Japanese Golf Brands follows it.

MP, JPX and Mizuno Pro

  • MP is the player’s line of blades and compact cavity-backs. The profile credits the MP-600 as the first driver to use sliding weights, notes that the MP-25 of 2016 used 1025 Boron steel in place of 1025E, which changed its feel, and records that Chuo supplied replacement sets of the MP-14 and MP-29 in 2016.
  • JPX is the line aimed at a wider range of players. From the JPX 900 family in 2017 the JPX and MP lines were released in alternating years.
  • Mizuno Pro is the Japanese-market range. It was revived to protect price integrity, and it is sold in Japan only, through fitting locations, made fully to order and never discounted. The profile notes that Japanese retailers often negotiate about 20 per cent below the sticker price. Several models track global equivalents: the Pro 118 corresponds to the MP-18, the Pro 318 to the MP-18 Split Cavity, the Pro 518 to the MP-18 MMC, and the Pro 718 is nearly identical to the JPX 919 Forged with a copper underlay. The Pro 918 has no global equivalent.
  • Japan-only drivers. The MP Type-1 (435 cc) and Type-2 (460 cc) were sold in Japan alone.

Why collectors and players look for Mizuno

  • Continuity of feel. A long partnership with one forge is a plausible reason why Mizuno irons from different eras are so often described as feeling alike.
  • Japan-only pieces. Mizuno Pro heads and the MP Type drivers were not part of the global range, which makes a complete example worth a second look.
  • Specification. A fitted set carries the specification it was ordered with, and a genuine fitted spec is part of its story. Check the stamp, the shaft band and the grip together.

Read next: Miura Golf: A Himeji Family Forge, which sets a family forge against a corporate partnership, and Japanese Golf Brands Compared: Forging, Faces and Feel, which lines the makers up side by side.

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Index terms: mizuno golf history · mizuno grain flow forging · chuo forge mizuno · mizuno yoro craft · mizuno mp irons · mizuno pro japan only · mizuno jpx vs mp · japanese forged irons · mizuno star line 1933

References

Dates and figures in this chapter were checked against these pages. Where accounts differ, the text says so.

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