Understanding the Seki Division of Labor System

Seki City is associated with bungyosei (分業制), a division-of-labor model in which specialist workshops may handle different production stages. The exact route varies by company and model.

How the System Works

A single pair of professional scissors may pass through six or more separate workshops before completion. Each stage has its own specialists:

• Steel procurement (鋼材商 / kozaisho): Specialist traders source raw steel from mills like Takefu Special Steel or Hitachi Metals and supply it to manufacturers.
• Forging and pressing (鍛造/プレス / tanzo/puresu): Raw steel is shaped into blade blanks through hot forging or precision pressing.
• Grinding (研削 / kensaku): Blade blanks are ground to the correct profile and thickness. This is where the convex edge geometry begins to take shape.
• Heat treatment (熱処理 / netsushori): Blades are hardened and tempered to achieve the target Rockwell hardness. This stage is critical — incorrect heat treatment ruins even the finest steel.
• Assembly (組立 / kumitate): Blades are paired, fitted with a pivot mechanism, and adjusted for tension and alignment.
• Sharpening and finishing (研ぎ/仕上げ / togi/shiage): Final edge sharpening and cosmetic finishing. Many premium scissors are hand-sharpened by specialists with decades of experience.
• Engraving (刻印 / kokuin): Brand names, model numbers, and logos are applied.

What This Means for Brands

Under a division-of-labor or OEM arrangement, a company may design a scissor, set specifications, and commission some or all production stages from specialist suppliers. Ownership of equipment alone does not establish the quality or origin of the finished model.

The arrangement is neither a positive nor a negative by itself. The relevant questions are which specifications apply, who is responsible for each stage, how the product is inspected, and what warranty and service support the buyer receives.

Why Stylists Should Care

Understanding bungyosei helps buyers separate brand identity, supplier relationships, production stages, and finished-product origin. Similar appearance does not prove a shared factory, and a regional name does not establish the quality of every model. Check the exact maker statement and product documentation.