Merging Aichi Kogyo and Shinkawa Kogyo to form Aisin Seiki (1965)

Parity as the point of entry

The heart of this merger is that it was designed not as an absorption with a winner and a loser but as a union of equals. On paper Aichi Kogyo absorbed Shinkawa Kogyo, yet the new name took one character from each of the two firms and erased neither. The care taken — four years of maturing from Eiji Toyoda’s first proposal — suggests how well the Toyota group understood that a merger without genuine reconciliation, however favourable its terms, fails to take root. The character of this union lies in its refusal to hurry, in waiting for the fruit to ripen.

The birth of Aisin Seiki in 1965 became the foundation for the decisions that followed. Four years later, in 1969, the company obtained its automatic-transmission business through the joint venture with Borg-Warner, raising the twin pillars of the parent and its AT subsidiary. And half a century on, in 2021, those two pillars folded back into one in the reorganization for the EV era, and the corporate name was unified simply as Aisin. The 1965 naming that bound two sibling companies together by keeping one character from each became, more than fifty years later, the banner of the whole group — an illustration of how long an idea of parity at the point of entry can go on shaping the very form of a company.