| Tohoku Sales Office |
| 7-1 Odaira, Kumagami, Miharu-machi, Tamura-gun, Fukushima-pref.,963-7704, Japan TEL.+81-247-62-0841 FAX.+81-247-62-0840 |
| MARUWA QUARTZ Miharu Plant |
| 7-1 Odaira, Kumagami, Miharu-machi, Tamura-gun, Fukushima-pref.,963-7704,Japan TEL.+81-247-62-0012 FAX.+81-247-62-0020 |