TOKYO — Another pillar of Japanese industry admitted falsifying quality data on Tuesday, as Toray Industries, a manufacturer of materials like carbon fiber, said one of its subsidiaries had for years been providing clients with false product-test reports.

The subsidiary, Toray Hybrid Cord, makes cordlike materials used to strengthen car tires and other objects. Toray said it had identified 149 instances in which Toray Hybrid Cord altered data after internal tests showed its cords failed to meet manufacturing standards demanded by customers.

Toray said it had sold products with falsified test data to 13 customers. It declined to name those customers but said the deception did not involve parts supplied to Boeing, to which Toray is an important provider of lightweight carbon-fiber components used in aircraft bodies.

The deception, which Toray said took place between 2008 and 2016, echoed similar practices admitted in recent weeks by Kobe Steel and Mitsubishi Materials. Together, the revelations have embarrassed a country that has built its economic reputation on reliable, high-quality manufacturing.