KAMUIWORKS Rex&Regina FORGED IRON C GRIND

Review: Japanese golfclubs KAMUIWORKS Rex&Regina FORGED Irons — C GRIND

Today I test-hit this golf club.

The demo club was a 7-iron from the KAMUIWORKS Rex&Regina FORGED Irons C GRIND.

The shaft is Dynamic Gold MID 115.

Loft: 29°, shaft flex: S200, club length: 37 inches, swingweight: D2, total weight: 429.8 g.

This is my first time meeting a KAMUIWORKS iron.

I’ve come across many excellent drivers from the brand, so KAMUIWORKS has always meant “driver” in my mind—and a good impression at that.

I’m not sure how many boutique “JDM” (Japanese Domestic Market) makers are around today, but KAMUIWORKS is an old, respected name. Back in the heyday of metal woods they were already releasing high-performance titanium drivers—clubs I admired from afar.

Thanks to the internet and e-commerce, it’s now easy to buy the club you want without traveling to another prefecture. Very convenient.

In the past, I’d flip through magazines thinking, “Looks great… I want to try that…”

The finish is premium, and the iron is beautiful.

You can almost “see” the softness of forged carbon steel just by looking at it.

I also like the satin finish that keeps harsh glare down.

Even the fine details on the back face are thoughtfully designed—it’s clear a lot of work went into this head.

Global brands like Callaway and TaylorMade are fantastic, of course, but Japan’s boutique club makers have a special allure of their own.

There’s the word “Rex&Regina” near the heel.

I wonder exactly what that signifies.

And those dot-like marks around it also catch my eye.

What effect are they intended to produce?

I don’t have all the answers—and that curiosity is part of the fun.

The five weights integrated into the sole really stand out.

I’ve seen this idea before—perhaps it’s a deliberate push toward a lower center of gravity?

Personally, I often picture the opposite: carving material out here to raise the CG a touch. Maybe this is a case of “the opposite can also be true.”

The cavity is shallow—I’d call it a half-cavity.

Half-cavity irons can look demanding at first glance, but this head gives off a surprisingly welcoming vibe.

The top line is about average.

I noticed fine, mill-like lines cut into the sole.

If the goal is turf interaction (clean “exit” through the grass), you usually see horizontal lines; this iron has them “vertical.”

There must be a solid reason for that choice.

The sole is on the wide side.

Its shape reminds me of a crescent moon.

You often see this kind of sole on irons and wedges.

That’s probably why it’s called a “C Grind.”

The leading edge relief is prominent.

On the trailing edge, both toe and heel are heavily ground away, leaving a wider center section.

Judging from this grind, turf exit should be excellent.

Hosel length is standard.

I also noticed a touch of offset (a slight goose-neck).

The hosel bears the words “KAMUI WORKS JAPAN.”

Most brands use stamped engravings here, but this subtle, watermark-like treatment looks cool.

The face has no milling—very simple.

What really struck me was the sense of “flatness.”

The face feels so uniformly flat it reminded me of a mirror.

You might say, “Aren’t all iron faces flat?” Not exactly.

Plenty of irons have faces that feel subtly rounded over the whole surface, unlike this one.

If you run your fingers across the face, many golfers will notice the difference.

The variation is pronounced from maker to maker; each time I demo certain brands, I find myself dissatisfied with how they treat the face plane.

Maybe those brands are less confident in irons and choose that approach—hard to know.

I’ve never measured it numerically, but from experience, a flatter face like this seems to “hold” the ball better and enhance spin.

That holds true for wedges as well.

Even the rehearsal swings felt promising.

It’s been a while since I’ve swung an iron shafted with DG, and it looks like a new model has been released.

With ultra-light setups I sometimes have to baby the timing, but not today.

From the top, I could simply let the club drop—almost as if the head was drawn into the back of the ball.

Setting up behind the ball, it looks clean and unforced.

At first glance I thought the head looked long from heel to toe, but over the ball that impression disappears. The size contrast with the ball is good, and the proportions feel balanced.

Even though the ball is always the same size, many modern heads—drivers included—have gotten so large that the overall balance looks off.

Preferences will differ, of course, but this size is right in my wheelhouse.

Make the head a touch more compact and the ball stands out more; your shot window sharpens—that would please me even more.

One note: at address the loft looks strong, so it didn’t really look like a 7-iron to my eye, and I didn’t picture a “high, ripping” flight.

That said, “strong lofts” are nothing new; I’ve tested plenty, so perhaps I’ve grown used to them.

Time to hit some balls.

The **feel** is soft and satisfying.

Instead of a springy “ping,” impact has a mellow, syrupy quality—I got that “thick” strike right from the first ball.

The ball really stays on the face and you can feel yourself carrying it into the follow-through.

The **sound** is pleasantly quiet.

Neither too high nor too low—more of a crisp “ka-tsun.” It feels less like you’re “hitting” and more like you’re transporting the ball.

**Launch** is average.

Given the stronger loft and a shaft that’s relatively heavy by today’s standards, you may need a certain level of clubhead speed.

Most distance-oriented irons I’ve tried include “assist features” to help the ball get up; I don’t see that here.

If anything, those five sole weights might be contributing.

But depending on the player, that effect may be subtle.

In terms of **forgiveness/stability**, I’d call it average.

It doesn’t feel punishing, and despite the sharp, handsome looks, its behavior is friendlier than you might expect.

The shaft helps, too—stable without getting whippy.

**Workability** is excellent.

Shaping the ball both ways is easy, with nothing getting in the way of your feel.

A 5-iron is usually easier to bend than a 7-iron, but today I found myself shaping shots as if this were a “5-iron mood.”

**Distance** is strong—easily about two clubs longer.

That said, this level has become “standard” lately, so I wouldn’t call it a pure distance iron.

Many distance irons feel thin and springy at impact; this one gives you a satisfying, thicker strike and holds the ball—so you get distance plus manageability. That’s a big draw.

For my first KAMUIWORKS iron, it lived up to their driver reputation—impressive.

Call it the “aesthetics of Japanese craft.”

They layer in functionality without neglecting beauty or feel at impact.

These irons showcase the real strength of Japan’s boutique makers—and of KAMUIWORKS itself.

KAMUIWORKS Rex & Regina FORGED Irons – C GRIND Specs & Features

☆

Ease of Setup…☆☆☆☆
Feel…☆☆☆☆
Ease of Launch…☆☆☆
Stability…☆☆☆
Distance…☆☆☆☆
Controllability…☆☆☆☆

※ (Maximum 100 points)
1 ☆ = 0-20 points
2 ☆ = 21-40 points
3 ☆ = 41-60 points
4 ☆ = 61-90 points
5 ☆ = 91-100 points

KAMUIWORKS JAPAN Online Shop

*Addition: Introduction to this club (I researched this club after writing this article)

Japanese golfclubs KAMUIWORKS Rex & Regina FORGED Iron — C GRIND

If you’re after a Japanese-forged, distance-oriented iron with a wide sole and optional C GRIND for cleaner turf interaction, the KAMUIWORKS Rex & Regina FORGED Iron is a standout. It’s made from S20C soft carbon steel, offers loft/lie customization, multiple head platings, and a full spec table from #5 through GW (47°). The C GRIND trims the leading/trailing edges on the wide sole so you can hit down without the sole fighting you. カムイワークスジャパン

Why this iron?

KAMUIWORKS positions Rex & Regina as a “distance-type forged iron” that lowers the center of gravity with a wide sole and employs strongish, modern lofts to deliver higher launch with stability—all while preserving forged feel. The maker also supports fitting-first customization: ±2° loft / ±4° lie adjustments, sole grind options (Standard / M GRIND / C GRIND), and head plating choices from classic chrome to Black Boron. For players who value precise build and finish, this level of factory-backed customization is uncommon. カムイワークスジャパン

What the manufacturer confirms

Model positioning & construction

• Category: Distance-type forged iron with a wide sole that promotes low CG and high trajectory.

• Material: S20C soft carbon steel, forged.

• Line-up: #5, #6, #7, #8, #9, PW, GW (47°).

• Pricing (heads only): Set (#6–PW) ¥105,000 (incl. tax ¥115,500); single #5 ¥21,000 (¥23,100); GW ¥21,000 (¥23,100).

• Adjustability: Loft ±2° / Lie ±4° (factory service).

• Sole options: Standard / M GRIND / C GRIND.
  All above per the official product page. カムイワークスジャパン

What “C GRIND” means on this head

• The C GRIND keeps the wide-sole footprint but shaves the leading and trailing edges, creating a sole that enters and exits turf more cleanly when you hit down. It’s the Rex & Regina sole option aimed at improving “dig-resistance” and strike versatility without giving up the benefits of the wide sole. カムイワークスジャパン

Note: KAMUIWORKS has also highlighted C-GRIND builds in Black Boron matte on its official X account, underscoring that the C GRIND is a current, supported option. X (formerly Twitter)

Full official specs (heads)

Finish (head plating) options

• A: Chrome Satin (Std)

• B: White Chrome

• C: Soft Black

• D: Black Boron (matte)

• E: Copper smoked finish

• F: Chrome Satin Face / No-plating (face)

• G: Black Boron matte / Face Ni exposed
  These are offered as factory processing options. カムイワークスジャパン

How that translates to real golfers

Who will likely benefit

• Players who want help launching the ball while keeping forged feel. The wide sole + low CG design is built for high trajectory with stability.

• Steeper players or modest-turf conditions who still want a wide sole but dislike bounce-induced “skids”: C GRIND reduces the leading/trailing edge bulk so you can take a confident, descending blow.

• Builders who care about precise specing & aesthetics: ±2°/±4° loft/lie range, multiple platings, and color accents let you dial in both performance and look. カムイワークスジャパン

Who may not be a match

• Players who prefer ultra-compact, razor-thin soles and weak, traditional lofts may find the Rex & Regina’s wide sole + modern lofts outside their preference.

• Shallow sweepers who rely on very high bounce from thick leading edges may prefer the Standard sole or M GRIND rather than the more “cut-away” C GRIND. (This follows from how the maker describes each grind’s intent.) カムイワークスジャパン

Pros & Cons (fact-based)

Pros

• S20C forged—classic Japanese soft-iron feel. カムイワークスジャパン

• Distance-type head with wide sole and modern lofts for easy, high launch. カムイワークスジャパン

• Optional C GRIND that trims leading/trailing edges for cleaner turf entry/exit on a wide sole. カムイワークスジャパン

• Factory adjustability (loft ±2° / lie ±4°) and rich plating menu for fit and finish. カムイワークスジャパン

Cons

• Official site does not publish shaft lineup or swing-weight charts—these depend on the builder/fitter. (Not listed on the product page.) カムイワークスジャパン

• No manufacturer carry-distance chart by head speed; reliable large-sample third-party data is limited publicly. (See section below.) カムイワークスジャパン

“Distance by head speed”

Manufacturer-published carry/total by head speed is not provided. To avoid speculation, no distance table is included here. For accurate gapping: use a launch monitor with your final build and record ball speed / launch / spin per club. (This omission is intentional to meet your requirement: “確定情報のみで構成。不明点は無理に埋めない”.) カムイワークスジャパン

FAQs

Is Rex & Regina FORGED actually forged? Which steel?
Yes. S20C soft carbon steel, forged construction. カムイワークスジャパン

What are the stock lofts?
#5–GW (47°). Full loft/lie/FP/bounce table above. カムイワークスジャパン

What exactly is “C GRIND” on this iron?
A custom sole that cuts (relieves) the leading and trailing edges on the wide sole, letting you hit down without the sole adding excess resistance. カムイワークスジャパン

Can I change loft/lie at the factory?
Yes: Loft ±2° / Lie ±4°. カムイワークスジャパン

What finishes are available?
Chrome Satin, White Chrome, Soft Black, Black Boron (matte), Copper-smoked, Chrome Satin Face (no-plating on face), Black Boron matte / Face Ni exposed. カムイワークスジャパン

Any verified “voice of the player” sources?
The official site doesn’t list customer reviews. Publicly, there are brand-produced demo videos and posts (e.g., a tour-pro demo and X posts). Treat these as product demonstrations rather than independent testing. YouTubeYouTubeX (formerly Twitter)

Buying & build notes

• Decide sole first (C GRIND vs M GRIND vs Standard) based on attack angle and turf. C GRIND is the more “hit-down friendly” relief on a wide sole. カムイワークスジャパン

• Confirm final loft/lie (factory: ±2° / ±4°) after choosing shafts/grips to preserve desired launch windows and swing weight. カムイワークスジャパン

• Pick a head finish suited to your course lighting and glare preference (Chrome vs Soft Black vs Black Boron etc.). カムイワークスジャパン

• If you need PW/GW continuity, note that the GW is 47° and keeps the family shape; you can add specialty wedges above it as needed. カムイワークスジャパン

Final verdict

For players who want a forged, high-launch, distance-leaning JDM iron but dislike bulky leading edges, the Rex & Regina FORGED with C GRIND hits a rare balance: wide-sole stability with edge relief for confident turf interaction, backed by factory spec transparency (full loft/lie/FP/bounce) and custom build controls. If that matches your swing and course, it deserves a top-of-list demo. カムイワークスジャパン

口コミ

• Official site: No native customer review module found for this model as of September 4, 2025 (JST).

• Brand/demo content: KAMUIWORKS posts showcasing C GRIND builds; tour-pro test video exists, which is informative but not independent large-sample testing. (Links below in “Sources”.) X (formerly Twitter)YouTubeYouTube

Because you requested zero speculation, no paraphrased “impressions” are included unless directly attributable to an official or clearly identified source.

Fact-extraction checklist (for manual verification against the official page)

• Model: KAMUIWORKS Rex & Regina FORGED Iron (Rex & Regina line). カムイワークスジャパン

• Category/positioning: Distance-type forged iron, wide sole, low CG / high trajectory. カムイワークスジャパン

• Material: S20C soft carbon steel (forged). カムイワークスジャパン

• Loft table: #5 24°, #6 26°, #7 29°, #8 33°, #9 37°, PW 42°, GW 47°. カムイワークスジャパン

• Lie angles: 60.5°, 61°, 61.5°, 62°, 62.5°, 63°, 63.5° (5→GW). カムイワークスジャパン

• Head weights (g): 255, 261, 267, 273, 279, 285, 297 (5→GW). カムイワークスジャパン

• FP (mm): 3.3, 3.6, 3.9, 4.2, 4.5, 4.8, 5.1 (5→GW). カムイワークスジャパン

• Bounce (°): 0, 0.5, 1, 1, 2, 2, 3 (5→GW). カムイワークスジャパン

• Adjustability: Loft ±2° / Lie ±4°. カムイワークスジャパン

• Sole choices: Standard / M GRIND / C GRIND; C GRIND trims leading & trailing edges for a more “hit-down-friendly” wide sole. カムイワークスジャパン

• Line-up: #5–GW (47°). カムイワークスジャパン

• Head pricing: Set (#6–PW) ¥105,000 (tax-in ¥115,500); single #5 ¥21,000 (¥23,100); GW ¥21,000 (¥23,100). カムイワークスジャパン

• Head plating options: A–G list (Chrome Satin / White Chrome / Soft Black / Black Boron matte / Copper smoked / Chrome Satin Face No-plating / Black Boron matte Face Ni exposed). カムイワークスジャパン

Sources (manufacturer & official channels)

• KAMUIWORKS official — Rex & Regina Iron page (full specs, C/M/Standard soles, pricing, finishes, adjustability): Rex & Regina アイアン公式ページ（日本語）. カムイワークスジャパン

• KAMUIWORKS official — X (C GRIND / Black Boron matte showcase): @kamuiworksjapan. X (formerly Twitter)

• Brand/demo video — Tour pro tests Rex & Regina irons (for awareness; not an independent consumer review): YouTube. YouTubeYouTube

Important compliance notes

• Distances by head speed: Not published by the manufacturer → intentionally omitted to avoid speculation. カムイワークスジャパン

• All specs and claims above are drawn from the official page and official channels only. If KAMUIWORKS updates the page, treat the official page as the source of truth. カムイワークスジャパン

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