February 22, 2005 Mitsubishi Rayon Co., Ltd. Price raise planned on MBS and other plastic modifiers for customers in East Asia Mitsubishi Rayon has decided to announce a price raise of 10% on MBS and the other plastic modifiers. The raise will go into effect, for all grades of modifier, on shipments by sea from March 2005 to customers in countries in East Asia. Talks with the Company’s principal users have already been initiated.    Mitsubishi Rayon implemented a number of price raise in 2004, but the market prices of the main raw materials – MMA (methyl methacrylate) monomer, butadiene, styrene monomer and so on – remain at a high level owing to the tightness of supply. On the demand side, meanwhile, demand for MBS and other plastic modifiers remains strong, most notably in China, and the inventories of the modifiers have fallen to extremely low levels.    Amid these circumstances, the Company is compelled to pass on the increase in costs to its customers in order to maintain a sufficient level of earnings. For further inquiries, please contact: Public and Investor Relations Office e-mail: koho@mrc.co.jp [PAGE TOP]