Miyazaki Kusala Golf Shaft Review


By Tony Curro
Tru-Fit Custom Clubfitters, Latham, NY

SRI Sports launched the Miyazaki brand in 2009. They are produced in the Dunlop Golf Club Corporation factory in Miyazaki, Japan. That factory began producing premium graphite shafts in 1991. Prior to the launch of Miyazaki, the shafts were produced for Dunlop, XXIO and Srixon. Miyazaki has assembled an EI/GJ database of over 5000 shafts. It is evident from the consistency and design of the profiles we have measured that they have used this survey of shafts in the design of the Miyazaki golf shafts. Every Miyazaki shaft is imprinted with a 4 number code indicating the stiffness of 4 zones of the shaft.

The Miyazaki golf shaft company is located in Kobe City, Japan.  With the addition of the Kusala White, and Indigo series shafts, which were introduced in 2012, the Kusala Series is without a doubt the most complete line of shafts on the market today.  With each series containing flex ranges of R, S, and X, and weight ranges of 59/61, 72, and 83, there is a shaft which will benefit every golfer.   The series has 5 different performance DNA’s which are designed for golfers looking for specific results.  The Miyazaki golf company has designed a flex coding system which rates a shaft’s stiffness on a scale of 0-9 (with 0 being the most flexible, and 9 being the stiffest)   They have sub-divided the shaft into 4 regions: Tip, Mid-tip, Mid-butt, and Butt.  Therefore, on each shaft, you will see a series of 4 numbers which define the distinct DNA of the shaft.  In all, there are a 15 different flex codes, designed by Miyazaki. Having this series of shafts in any custom fitting studio is a fitters dream.  The radial quality of the Miyazaki Kusala series is excellent, the shafts can be installed in any orientation and is well suited for use in rotating hosel driver and fairway heads.


Miyazaki Kusala White

The White Series has weights of 56, 61, 72 and 83.  The torque ranges from 4.8 in the 56R to 2.8 in the 83X shafts.This series features a soft yet stable feel in the hands, with a very active tip section.  The EI profile compared to the other models shows us that indeed, this shaft provides the golfer with the most active tip.  The Flex code for the X flexes in all weights is (6852)   This flex signature based on a scale of 9, tells us that the butt section in this model has some flex in the hands, then stiffens significantly around the 30 inch mark, into the mid tip region, and then becomes more active around the 13 inch mark to the tip.  The flexural signature definitely supports the international flex code that Miyazaki gives it in comparison to its other models.  I have found these shafts fit well with golfers who tend to hit the ball with a low to mid trajectory, and the heavier weights are ideal in Fairway woods.


Miyazaki Kusala Blue

The Blue series fits a wide range of golfers by softening the mid butt to the mid tip region, giving golfers with a smoother transition more feel at impact. It is available in 50-80 gram versions. The torque ranges from 4.8 in the 56R to 2.9 in the 83X shafts. The flexural Index supports this when comparing it to the other models.  In looking at the graph around the 14 inch mark, the shaft softens and stays consistent until it reaches the 30 inch mark which is around mid butt section.  The rate of stiffness increases consistently to the butt section.  This is seen by an almost perfect straight line from the 16 inch mark, to the end of the shaft.  The flex code on the 61X is (7756), and the graph supports this.  These shafts work well with golfers who have a smooth transition, and are looking for a mid trajectory ball flight.


Miyazaki Kusala Silver

The silver has a very stiff butt section with an active tip area that produces a mid-high trajectory. It is available in 50-80 gram versions. The torque ranges from 4.8 in the 56R to 2.9 in the 83X shafts.The flex code compared to the white, which also has an active tip area, is a bit stiffer.  In comparing this shaft to the others, it gives the golfer the stiffest butt section of the 5 series, and the flex code of (8755) supports this.  This shaft flexes stiffer to about the 20 inch mark, then from mid tip to the tip section, plays softer.  This Flexural signature promotes higher launch conditions without ballooning.  I have found (the 61X) very effective for golfers who swing it in the high 90’s that have an average transition, looking for a bit more trajectory, without increasing spin.


Miyazaki Kusala Indigo

The Indigo has the most consistent flex code. It is available in 50-80 gram versions. The torque ranges from 4.6 in the 61R to 2.8 in the 83X shafts. Looking at the EI Graph, it produces a near straight line.  The X flex code (7777) shows us a uniform stiffness, and is ideal for golfers who have very aggressive transitions.  With very little deviation from Butt to tip, the heavier weights fit quite nicely the occasional golfer who is very strong, and swings it fast with a forceful transition.   I have put two former Division I baseball players in the 83X, and a gentleman who trims the hooves of cows for a living.  Extremely strong individuals who need the extra weight, and like the stiffer feel at the top.


Miyazaki Kusala Black

The Black series works well with strong players looking for a bit more feel in the handle, who tend to struggle with higher spin rates.  It is available in 60-80 gram versions.  The torque ranges from 4.0 in the 61R to 3.0 in the 83X shafts.  The flex code of (5689) in the X flex, gives the golfer the most stable tip section of all the models.  From the 24 inch mark to the tip, this shaft maintains its stiffness, which is evident in the graph.  I have found that this shaft truly promotes lower spin numbers given to me by the Flightscope launch monitor.  Golfers with very smooth tempo and a smooth transition looking for a lower more boring trajectory really benefit from this shaft.

Kusala EiGj


Miyazaki has really hit a home run with this line of shafts.  It gives me a shaft for every type of golfer who comes into my shop.  With 3 flexes (R,S, X) and 3 weights (59/61, 72. 83) for each series, it is a club-fitters dream.  Each shaft model has proven to benefit different categories of golfer’s.  Having the flex code numbers available during a fitting takes the guess-work out of which shaft model I choose.  The handsome graphics make these shafts distinctive in their own right.  Each model has its own graphics, and each is an original design.   These models only offer a .335 tip, but the tips are extremely stable, and deliver unmatched performance.

  • Michael Riishuus

    If a person imitates Mike Austin, with early uncocking, throwing the club rather than swinging, at +115 mph which kusala shaft would fit that bill?

    • it is always hard to recommend a shaft without seeing you swing and comparing the effects of your interaction with different shafts. At 115 you can eliminate all but the stiffest 70 or 80 grams models. As you can see from the graphic, almost every imaginable proflle patters is offered. You will have to hit them to see which feels best.