Nichibo and Nippon Rayon merge as equals to create Unitika (1969)

The integration cost of an earlier risk firewall

What is essential in this decision is that a parent and a subsidiary run as separate legal entities for forty-three years were rebuilt into a single enterprise under the framework of a merger of equals. Setting up Nippon Rayon in 1926 had been, for its time, the rational choice: it walled the uncertainty of chemical fibres off from the cotton-spinning business on which the company lived. But because the separation lasted forty-three years, cotton and chemicals each raised their own business practices and their own methods of control, and the 1969 reunion can be read as having imported that difference into the company rather than resolving it.

A merger of equals appears to have presupposed the preservation of employment, without voluntary redundancies, and starting life carrying all 22,000 employees was one reason the new company set out with productivity per head visibly below Toray and Teijin. The same trait recurs fifty-five years later: when Unitika withdrew from its founding fibre business in 2024, consideration for employment was again spoken of as a premise of the decision. Securing scale and making that scale function as one enterprise are different problems, and Unitika’s merger deserves to be remembered as a case in which closing the distance between them took a very long time.