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TRIS Inc. manufactures carbon brushes, carbon commutators and carbon bearings, mainly for automotive applications.
Established in 1946 and based in Mie, Japan, TRIS Inc. manufactures carbon brushes, brush holder assemblies, carbon commutators, carbon bearings and powder metallurgy parts, mainly for the automotive field. It has three factories in Mie prefecture and production bases in Taiwan, the US, China and Thailand. Marunouchi Capital acquired the company in 2017. In October 2025, AISAN INDUSTRY CO., LTD. announced it will fully acquire TRIS from Marunouchi Capital.
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