top of page

Yamato Factory  Ota, Gunma Pref, Japan       Photos by Mike Ward

The original company was established in 1951 under their former name of the Kokusai Kyouti Kougyo Co. and was renamed in 1957 as the Yamato Motor Co. It currently employs about 120 staff.

     When the motor boat racing law was then introduced, they developed the first Japanese-made racing motor based on a Mercury design and have, ever since, been producing about 1,700 motor boats, propellers and engines per year for the pari-mutuel motor boat race.

factory front.jpg
engine test.jpg

Bench testing motors under load.

2015 motors.jpg

Model 321 motors awaiting final inspection.

test facilities.jpg

The test tank facility.

IMG_1500.jpeg

About 100 motors ready for dispatch to the stadiums.

IMG_1508.jpeg

Propeller making - there are 2 of these.

boat building.jpg

Race boats are manufactured by the traditional method.

Polishing.jpg

It's hard work in the polishing department.

IMG_1499.jpeg

Race boats ready for delivery - October 2025

boats arriving at stadium.jpg

New race boats arriving at the stadium

Carb assembly.jpeg
IMG_1493.jpeg

Race boat spraying in the paint shop.

crankshafts.jpeg

Carburettor assembly in a climate / humidity contolled environment

Yamato factory for the sky.jpg

The Yamato Motor Co. manufacturing plant near Ota, Gunma Prefecture, Japan has it own sports facility adjacent.

Crankshafts ready for installation.

History video of the Yamato Motor Co.

Yamato in Japanese copy.png
bottom of page