Who am I?

I am Kosei Kirwan born in Ireland to Irish and Japanese parents. This is my golfing website to showcase who I am, where I came from and where I’m going.. hope you enjoy the journey!

Golfing ambitions

To be the best golfer I can be … naturally! I aim to be better today than I was yesterday and enjoy the process of learning and improving.
I wish to learn from the best coaches in Ireland and in college golf in America. I intend on gaining more competition experience internationally; I hope to attend a top academic university that also offers a top competitive golfing team experience that gives me the best chance to become a tour professional golfer.

Caddy for Jiri Zuska at Hotel Planner Tour August 2025

Profile at a glance:

Name:   Kosei Kirwan
Dob: 8th September 2008 (Age 16)
Height: 6 feet 2 inches
Weight: 79kg (174 pounds)
School: 5th year (Sopohmore High School)
GPA: 3.7
Record swing speed : 125.6 mph
Average swing speed: 119 mph
Record ball speed: 182.8 mph
Handicap index: +1.7
Golf club membership: Knightsbrook GC - 7220 yards CR 75.2
Longest drive: 345 yards (carry 294yds)
High school graduation: 2027 golfer
NCAA: 2406321877

Carry distances:

Athletic and Academic

University & College coaches can email me to access my grades at Kosei@koseikirwangolf.com

My Team

My main swing coach and lesson instruction comes from Kenny Fahey at the GolfIreland Academy at Carton House Co. Kildare. All customisation of my equipment goes trough his meticulous hands.

Kosei’s Swing Coach & Mentor

Kenny Fahey

Golf Coach

kenny@bettergolf.ie

Kosei’s Performance Coach

Nollaig O’Sullivan

Performance Psychologist

info@myperformance.ie

Diet, Nutrition & Fitness

I have a wide and varied healthy diet which excludes junk food and sugar based drinks. I love all cuisines especially Japanese and am very conscious of my nutritional needs for performance in sport.

I focus my nutrition to enable moderate muscle gain and use higher energy foods when active in sports to help deliver performance.

I would consider myself to be very fit and work on strength and conditioning daily. Have a look at some of my fitness videos below. (Added soon!)

Whats in the bag?

Driver: Taylormade Qi10 LS 9* with black Ventus 6X velocore shaft.

5 Wood: Taylormade Qi10 with Ventus 5 S shaft.
3 Hybrid: Taylormade Sim 2 with Ventus 7 S shaft.
Irons: Taylormade P7 MC 4 to PW with Nippon Modus Tour 120T extra stiff shaft.
Wedges: (same shaft as irons)

Taylormade MG4 50* SB 09
Taylormade MG4 54* SB 11
Taylormade MG4 58* HBW 13
Putter: Taylormade Spider X.

Ball: Taylormade TP5X


Team Sports