Corporate > Business Location Business Location Functional Materials Group Diamond Tool Group Head Office Head Office 1-11-11, Shiba, Minato-ku, Tokyo 105-0014 TEL:+81-3-5418-1805 FAX:+81-3-5418-1811 1-11-11, Shiba, Minato-ku, Tokyo 105-0014 TEL:+81-3-5418-1809 FAX:+81-3-5418-1811