ZEON Corporation has announced that its selling prices for synthetic rubber will be raised as listed below.

Notification of Price Increase for Synthetic Rubber
May 12, 2005
1. Price increase by the product type
- SBR Non-oil extended 13 yen/kg
Oil extended 10 yen/kg - BR 19 yen/kg
- HSD 11 yen/kg
- IR 9 yen/kg
2. Effective date
The price rises will come into effect for the May 16, 2005 product delivery.
3. Reason for the price increase
Product profitability has continued to suffer due to price hikes of naphtha and raw materials despite our continuing efforts to reduce manufacturing costs.