| Kitakanto Sales Office |
| 750 Shimoakasaka, Kawagoe-city, Saitama-pref., 350-1155, Japan TEL.+81-49-278-2208 FAX.+81-49-278-2771 |
| MARUWA QUARTZ Kawagoe Plant |
| 750 Shimoakasaka, Kawagoe-city, Saitama-pref., 350-1155, Japan TEL.+81-49-261-1851 FAX.+81-49-261-1838 |