Message from the President
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Message from the President
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For more than 55 years, HIOS has walked alongside the world of screws.
Our journey began in 1970 with the creation of the “Totsu Screw,” which became the foundation of our company.
It all started with a simple desire — to prevent a slotted screw from slipping when tightened.
By adding a small indentation at the center of the screw head and a matching protrusion at the tip of the screwdriver, we changed the way screws and drivers engage with one another, dramatically improving both productivity and quality in manufacturing.
Since then, as a pioneer in screw fastening technology, HIOS has continued to deliver innovative products that support manufacturing quality — including the world’s first electric screwdrivers with precision torque control through current regulation, torque-controlled battery models, auto-clutch drivers, and torque measurement instruments.
Today, these technologies and products are used in manufacturing sites across more than 90 countries, contributing to the advancement of global manufacturing.
Now, the manufacturing landscape is undergoing a major transformation.
Automation and digitalization are progressing rapidly, and even screw-fastening processes are evolving into a data-driven stage.
HIOS provides new solutions that visualize how each screw is fastened — helping manufacturers enhance quality, productivity, and sustainability.
We also pursue screw fastening that is “easy to tighten, easy to remove,” and “human-friendly yet ideal for automation.”
We believe this pursuit embodies our mission and represents an essential value for the future of manufacturing.
We sincerely appreciate the continued support of everyone who has been part of the HIOS journey.
Moving forward, HIOS will continue to walk with screws as a “Screw Fastening Solution Company,” building the future of fastening that supports manufacturing industries around the world.
Katsuyuki Totsu
President and Representative Director
Born in 1940 in Oshiage, Sumida-ku, Tokyo.
Graduated from Chuo University.
From a young age, Mr. Totsu had a strong interest in mechanics and enjoyed working on car maintenance.,
One day, while tightening a slotted screw, he experienced the inconvenience of the screwdriver slipping out of the groove.
This sparked his curiosity and led him to search for a way to “prevent the driver from slipping out of the screw slot,” marking the beginning of his path as an inventor.
In 1968, at the age of 28, he established the Totsu Research Laboratory, launching a business to develop, manufacture, and sell improved slotted screws known as the “Totsu Screw.”
In 1970, at the age of 30, he proposed the “Totsu Screw” together with the world’s first electric screwdriver featuring current-controlled torque adjustment as a labor-saving system to Seikosha (now SEIKO).
The following year, he relocated the company’s headquarters to Akasaka, Minato-ku, Tokyo, and assumed the position of President and Representative Director.
He later founded the HIOS brand — an acronym for “Hole-In-One-System” — and began full-scale expansion into global markets.