Kikui Scissors: The 1973 Invention That Proved Cobalt Could Replace Stainless

In 1973, Kiyoji Kikui did something nobody thought possible: he built hairdressing scissors from an alloy that was 70% cobalt.

The industry at the time ran on stainless steel. Every manufacturer, from budget to premium, used some variation of stainless. The alloy compositions varied. The heat treatments differed. But the fundamental material was the same, because stainless steel worked. It was hard, it was corrosion-resistant, it was available, and everyone knew how to work with it.

Kikui looked at stainless steel and saw a compromise. He built something better. And more than fifty years later, the rest of the industry is still catching up.

Kiyoji Kikui: 1914-2004

The story starts with the man, not the company.

Kiyoji Kikui was born in 1914 and founded his scissor company in 1953 in Wakayama Prefecture. For twenty years, he made conventional scissors using conventional materials. He learned the craft, built a reputation, and could have continued making perfectly good stainless steel scissors for the rest of his career.

Instead, in 1973, he turned everything on its head.

The decision to build scissors from cobalt alloy was radical for several reasons. Cobalt was not used in scissor manufacturing. The alloy was difficult to work — far more demanding than stainless steel in every stage of production. The tooling required was different. The grinding was different. The finishing was different. The entire manufacturing workflow had to be reinvented.

And the material was expensive. Cobalt has always cost significantly more than the iron and chromium that form the basis of stainless steel. Building a product line around it meant higher costs, higher prices, and a much smaller potential market.

Kikui did it anyway. The result was the world’s first cobalt alloy styling scissors — a tool that did not just resist rust but was completely, permanently immune to it. A tool that cut differently, felt differently, and lasted differently than anything the market had ever seen.

Kiyoji Kikui passed away in 2004, but the company and the innovation he started continue under the same principles he established.

Why 70% Cobalt Changes Everything

To understand what makes Kikui scissors fundamentally different, you need to understand the difference between cobalt alloy and cobalt-added stainless steel. These are not variations on a theme. They are different materials.

Most “cobalt scissors” on the market are stainless steel with 1-5% cobalt added. The base material is still iron-chromium stainless. The cobalt addition improves certain properties — slightly better edge retention, slightly different hardness characteristics — but the scissors remain fundamentally stainless steel tools.

Kikui’s alloy is approximately 70% cobalt. The base material is cobalt itself. The resulting properties are not slightly different from stainless steel. They are categorically different.

The magnetic test is the quickest way to distinguish genuine high-cobalt scissors from cobalt-added stainless. A magnet will stick firmly to stainless steel scissors, regardless of their cobalt content. A magnet will not stick to Kikui’s cobalt alloy. If someone sells you “cobalt scissors” and a magnet sticks to them, they are stainless steel with a marketing upgrade.

The HRC number deserves special attention. At HRC 47, Kikui’s cobalt scissors appear soft compared to premium stainless at HRC 60-64. This comparison is misleading. Cobalt does not lose its edge through the same mechanism as stainless steel. Stainless loses sharpness when the thin edge deforms or chips — hardness resists this. Cobalt loses sharpness through gradual abrasion — and cobalt’s abrasion resistance is extraordinary. The practical edge life of a cobalt scissor at HRC 47 can match or exceed a stainless scissor at HRC 62, because the wear is slower and more uniform.

Only Three Scissor Masters

Here is a number that puts Kikui’s production in perspective: each pair of scissors is finished by one of only three scissor masters.

Three. In the entire company.

Working with 70% cobalt alloy requires skills that standard scissor-making training does not provide. The material responds differently to grinding, differently to finishing, differently to edge-setting. Only a limited number of craftspeople in Japan have the expertise to work this material at the level Kikui demands.

Each of those three masters finishes every scissor to the same standard. There is no “A-team” and “B-team” at Kikui. Every pair that leaves the workshop has been in the hands of one of three people who have spent years mastering this specific material.

Built-to-Order Since 2001

Since 2001, Kikui has operated on a 100% built-to-order model. Nothing sits in stock. When you order a pair of Kikui scissors, your order initiates the manufacturing process from scratch.

Each pair takes 4-5 weeks to produce.

In an industry where next-day shipping is expected and Amazon Prime has trained everyone to expect instant gratification, asking customers to wait over a month for their scissors is a bold position. It works for Kikui because the people who buy Kikui scissors understand what they are getting and why it takes time.

The built-to-order model also means zero waste. No overproduction. No inventory sitting in warehouses losing value. No pressure to discount unsold stock. Every pair produced has a customer waiting for it.

This is the manufacturing philosophy equivalent of Hikari’s 1,000-per-month production cap — a deliberate choice to prioritize quality and purpose over volume.

WPC Processing and DLC Coating

Kikui offers two advanced surface treatments that push their scissors even further beyond the standard:

WPC Processing — 微粒子ショットピーニング (biryuushi shotto piiningu, ultrafine shot peening) — bombards the scissor surface with ultrafine ceramic particles measuring 50 micrometers in diameter, propelled at high speed. This treatment compresses the surface layer of the metal, increasing fatigue resistance and creating a microscopically textured surface that reduces friction during cutting.

Fifty micrometers is extraordinarily fine. Standard shot peening uses particles measured in millimeters. Kikui’s ultrafine process works at the micro scale, modifying the surface without changing the blade geometry or edge profile.

DLC Coating (Diamond-Like Carbon) adds a thin, extremely hard carbon layer to the blade surface. DLC is used in medical instruments, aerospace components, and high-performance engine parts. On scissors, it reduces surface friction to near-zero, meaning hair slides along the blade with virtually no resistance.

The combination of WPC processing and DLC coating is available as an upgrade option at an additional cost of approximately 39,600 yen. It is not cheap, but for stylists who demand absolute minimum cutting resistance — particularly those doing high-volume slide-cutting and texturizing — the difference in cutting feel is tangible.

Screw Lifespan: 30+ Years

One detail that reveals Kikui’s engineering philosophy: their screw mechanisms are built to last 30 or more years.

The pivot screw is the most mechanically stressed component of any scissor. It bears the full force of every cut, absorbs the rotational torque, and must maintain precise tension over millions of cycles. Most scissor screws loosen over time, requiring periodic adjustment. Cheaply made screws wear out entirely and need replacement.

Kikui’s screw mechanisms are engineered for the same lifespan as the blades themselves. A Kikui scissor is not designed to have its screws replaced. It is designed to have its screws work correctly for decades.

This long-term thinking pervades the entire product. When your alloy does not rust, your screws last 30 years, and your cobalt blade outlasts stainless steel — the total cost of ownership calculation changes dramatically. A Kikui scissor that costs more upfront may cost less per year of service than a cheaper tool replaced every 3-5 years.

2015 Good Design Award

Kikui received the Good Design Award in 2015, recognizing not just the aesthetic quality of their scissors but the innovative use of cobalt alloy in a product category that had been stainless-steel-only for generations.

The Good Design Award is Japan’s most respected industrial design recognition. For a small, built-to-order workshop with three scissor masters to receive the same award that goes to Toyota and Sony says something about the level of innovation Kikui represents.

The Wakayama Connection

Kikui shares Wakayama Prefecture with Hayashi Scissors, the company that achieved HRC 67 using powder metallurgy and two-piece welding. This is not coincidence so much as pattern: Wakayama, outside the dominant Seki City ecosystem, has become a quiet center of radical scissor innovation.

Where Seki’s bungyosei system optimizes established processes, Wakayama’s independent workshops have the freedom to question fundamental assumptions. Kikui questioned whether scissors had to be stainless steel. Hayashi questioned whether hardness had a ceiling. Both answered their questions with products that the rest of the industry had to acknowledge.

How Kikui’s Cobalt Compares

The cobalt scissor market has expanded significantly since 1973, with several manufacturers now offering cobalt or cobalt-added options. Here is how the major players compare:

Kikui remains the benchmark for high-cobalt scissors, both because they were first and because their 70% cobalt concentration is among the highest in the market. Mizutani’s Stellite line at 50%+ cobalt and Joewell’s CBA-1 are the closest peer products from major manufacturers.

The cobalt-added stainless category (1-5% cobalt) is a fundamentally different product class. These are stainless steel scissors with a cobalt enhancement, not cobalt alloy scissors. The difference in corrosion immunity, wear characteristics, and cutting feel is substantial.

Who Should Consider Kikui

Kikui scissors are for stylists who meet a specific profile:

You work in wet or chemical-heavy environments. If your salon does a high volume of coloring, perming, or chemical treatments, the absolute corrosion immunity of cobalt alloy eliminates a category of tool degradation that stainless steel cannot avoid.

You value long-term cost of ownership. The upfront cost is higher. The 4-5 week wait is real. But a tool that never rusts, whose screws last 30 years, and whose edge outlasts stainless alternatives may cost less per year of actual use.

You have nickel sensitivity. Like Joewell’s CBA-1, Kikui’s cobalt alloy has minimal nickel content. For the 10-20% of the population with nickel sensitivity, this is not a luxury — it is a necessity.

You appreciate craftsmanship as an end in itself. Three scissor masters. Built to order. 4-5 weeks per pair. If that appeals to you — if you understand why someone would wait a month for scissors when Amazon delivers tomorrow — then Kikui is making scissors for people like you.

The 1973 Legacy

More than fifty years after Kiyoji Kikui built the first cobalt alloy hairdressing scissors, his invention has not been surpassed so much as validated. Every manufacturer that now offers cobalt scissors — from Mizutani’s Stellite to Joewell’s CBA-1 — is working within the space that Kikui opened.

The man who decided that stainless steel was a compromise was right. Cobalt alloy scissors do not rust. They do not corrode. They wear differently, cut differently, and last differently than anything made from stainless steel.

And the company he founded still makes them the same way: by hand, by masters, one pair at a time, in a workshop in Wakayama that changed what scissors could be.