Toho Tenax
 Toho Tenax (東邦テナックス Tōhō Tenakkusu) has been a member of the Teijin Group since 2000. Toho Tenax is an international company that supplies customers throughout the world with carbon fiber under the trade name Tenax. Tenax is produced by Toho Tenax in Japan the US and in Germany.The main products are carbon fiber oxidized poly-acrylic-nitrile (PAN) fiber and advanced composite material.