- TRIS Headquarters / Koyo Plant / Tamaki Plant ( Mie, Japan )
- TRIS USA Inc. ( Alabama, U.S.A. )
- TRIS ( THAILAND ) Co., Ltd. ( Rayon, Thailand )
- TRIS ( ZHENJIANG ) CARBON Co., Ltd. ( Jiangsu, China )
- TRIS SINTALLOY ( ZHENJIANG ) / POWDER METALLURGY Co., Ltd. ( Jiangsu, China )
- FUYUNG CARBON Co., Ltd. ( Taipei, Taiwan )
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