English edition. Prices are in Japanese yen from Japanese online stores, and most shops ship within Japan only. Links marked JP open pages in Japanese.

about

About

Profile

AboutAbout Golf Gear Lab (Score 72)
TitleGolf gear research nerd
ResearchMany years studying how golf clubs are made (head materials and construction, weight placement, shafts, assembly)
Scoring average72
Best score68
My measured distances7-iron 160 yards / Driver 270 yards
ContactContact form
AdvertisingAdvertising and sponsored articles (in Japanese)

I love poring over spec sheets

I'm a nerd who studies golf gear. Every time a new model comes out, I pore over the official spec sheet and technical materials.

To a nerd's eye, catalog numbers are numbers for individual parts: head weight, shaft weight, grip weight. The total weight and swing weight of the finished club change with how the length is set and which grip is chosen.

So on this site, I translate official numbers into “once it's built, what happens to the person hitting it?” Even with the same “S” label, weight and stiffness aren't the same across makers. I compare numbers, not names.

Why I built this site

When I look at numbers, there's one thing I care about most: not mistaking the lucky end of the spread for real ability.

Reading golf gear reviews, I see this mistake everywhere. Most “I switched and gained 5 yards” stories are memories of one or two balls. Hit 10 balls with the same club and they easily vary by 20 yards or more. Pick the best one out of those, and you can call any club “long.”

That's why I built a site that lines up official manufacturer numbers and compares clubs by how they're made. I haven't published any data from my own hitting and measuring yet. I'll add it as I measure products.

Conditions for publishing measurements (planned)

What I can't do. I'm not a coach. I don't give swing lessons or promise lower scores. What I can write about is the official numbers and how to read them.

The logging tool I use

To record and total my measurements, I use my own Shot Dispersion Notebook. It's free to use, so you can follow the same steps.

Open the tool

Last updated: Sep 2026