Japan's reputation for manufacturing prowess took another hit this week after Mitsubishi Materials Corp. admitted it faked data on some products just weeks after a similar scandal engulfed Kobe Steel Ltd.

Buyers of Japanese industrial goods from Boeing Co. to Airbus SE were once again scrambling to confirm whether safety had been compromised, after Mitsubishi Materials said three of its units had faked data on products that may have been delivered to more than 250 customers.

Mitsubishi Cable Industries Ltd. falsified data on rubber seals, while Mitsubishi Shindoh Co. misreported the strength of brass strips for auto parts, according to a statement Thursday. The products may have been shipped to 229 Mitsubishi Cable clients and 29 customers of Mitsubishi Shindoh.