When you hear the Diamana name, you immediately think of the current, or legendary, wood shafts that have been winning on tour for 20 years. However, few die-hard club junkies would think of a Diamana putter shaft, but Mitsubishi Golf is always pushing the limits and are delivering just that.

Graphite putter shafts have been a growing segment in the equipment world with companies noticing that they can create ultra-stable putter shafts that keep the putter on target through the stroke. Graphite also gives engineers the ability to adjust the performance, stiffness, and weight so golfers have more options to dial in the feel of their putter.

To get the full, in-depth review of the Mitsubishi Diamana P105 putter shaft check out the Club Junkie podcast on all podcast platforms or on YouTube.

Out of the box, the Mitsubishi Diamana P105 might be the best-looking putter shafts I have ever seen. The carbon weave at a 45-degree angle just reflects the light well, and then the shaft fades down into black near the tip section. A Diamana staple, the flowerband, is located just a little way under the grip but high enough up where it isn’t a distraction when looking down at the putter.

I installed the P105 into the new Bettinardi BB1 Wide putter, and it looked perfect with Bettinardi’s diamond black finish. The duo is definitely one of the meanest-looking combos in my rotation of putters. Both the P105 and the P135 are built using premium carbon fiber with a low amount of resin for added touch and feel. Mitsubishi utilizes 24t and high-strength intermediate modulus carbon fiber to build up the strength and stability, while the visible 6K woven fabric helps reduce torque.

The first question I get with this shaft is about the 108-gram weight. People areasking if it is too light. Honestly, if the shaft had no markings on it, I don’t know if I could tell that is was lighter than a traditional steel shaft. Now the head might feel a touch heavier and the balance of the putter slightly lower but I didn’t really notice the overall static weight of the putter being too light.

The P135 shaft comes in two flexes, 1.0 and the stiffer 2.0, but the P105 only comes in the 1.0 flex. To me, the P105 might be one of the softer graphite putter shafts I have tried and you can see a little bit of wiggle when you waggle the putter. Some players like a slightly softer putter shaft for additional feel and it can work with the tempo of their putting stroke.

On the course, the Diamana P105 offers the consistent stability that you expect from aftermarket putter shafts. On short putts the shaft stays right with your stroke and the putter head is always where you expect it, aligned with your hands and grip. Shorter strokes don’t show off the slightly softer flex of the shaft and you experience the added control of the low torque design.

When you hit longer lag putts you can notice a little flex in the shaft but the head never waivers from being square to your target. Speed control didn’t change at all from the traditional steel shaft in the Bettinardi to the Diamana. On the practice green hitting multiple putts at the same hole, it was easy to feel like you hit the correct speed and then see the results. Balls ended in the same area, as well as my skill would allow, and I never hit a ball the felt like it came up far shorter or longer than I expected it too.

Feel is such a subjective thing and each golfer is going to react differently to it. For me the Diamana had a slightly firmer feel than some of the other graphite shafts out there. If you are looking for responsiveness out of your putter shaft, the Diamana offers just that. To me the Diamana has more of a steel feel to it when it comes to getting the vibration from impact to your hands. You will feel exactly where you made contact on the face, giving you the ability to adjust your stroke and get back to making more center contact. I have found that most other graphite shafts mute the vibration a little and offer a softer feel, but the Diamana keeps the feel and sound exactly as they are.

Mitsubishi’s Diamana putter shaft is a great option for the golfer who wants to add some stability and consistency to their stroke without sacrificing feel. Players who love a specific putter face material or milling pattern to enhance their feel will be excited to not lose that with the upgrade to the Diamana.

Over the past year, equipment free agent Jason Day has played a number of different iron sets looking for his right match.

In May 2023, he was using a TaylorMade P770 4-iron to go along with a set of P7MC irons (5-PW).

In August 2023, he had switched to a set of TaylorMade P7TW irons (5-PW) to go with his P770 4-iron.

Then, in February 2024, he was into a full set of P760 irons (4-PW).

Now, Day has switched it all the way up, and he’s currently using a new set of Srixon ZX5 MK II long irons (3 and 4), and Srixon ZX7 MK II mid-to-short irons (5-PW).

On Tuesday at the 2024 RBC Heritage, Day told GolfWRX.com that he made the switch before the 2024 Texas Children’s Houston Open, because he was looking to reduce spin.

“For me, they spin a little bit less,” Day said. “They’re very good out of fairway bunkers, too. I haven’t played too much in the rough yet, so I still need to get an understanding of how the come out of the rough, but for me, it was all about spin control.”

“I had tested the previous model to these [Srixon ZX7’s], but I only had one club. And I was getting some inconsistent spinny with my previous irons, so I just decided to at least give them another shot. My biggest thing was to take spin off, because I was spinning it like crazy.”

The Srixon ZX7 MK II irons are known for producing low spin numbers, and pairing them with Day’s typical ultra-stiff True Temper X7 shafts make them certified spin killers.

If it’s spin he wanted to reduce, then Day may have found his match with the new Srixon irons.

See what else Day has in the bag at the 2024 RBC Heritage here

• Jason Day what’s in the bag accurate as of the RBC Heritage. 

Driver: Ping G430 LST (9 degrees @10)
Shaft: TPT Driver 15 Lo

3-wood: TaylorMade SIM Max (15 degrees)
Shaft: Mitsubishi Kuro Kage 80 X

• Check out more in-hand photos of Jason Day’s WITB here.

7-wood: TaylorMade Stealth (21 degrees)
Shaft: Mitsubishi Kuro Kage 80 X

Irons: Srixon ZX5 Mk II (3, 4), Srixon ZX7 Mk II (5-PW)
Shafts: True Temper Dynamic Gold X Seven

• Check out more in-hand photos of Jason Day’s WITB here.

Wedges: Titleist Vokey Design SM10 (52-08F, 56-10S, 60-04T), Cleveland RTX 6 ZipCore Tour Rack  (56-10 MID, 52-10 MID)
Shafts: True Temper Dynamic Gold X Seven

Putter: TaylorMade Itsy Bitsy Spider Limited

Grips: Golf Pride Tour Velvet Cord

• Check out more in-hand photos of Jason Day’s WITB here.

Ball: Bridgestone Tour B X (with Mindset)

Check out more in-hand photos of Jason Day’s WITB here.