April 1st, 2010
	Products have been updated. For details, please see "Overview of operations" shown above.

	July 1st, 2009
	Company Outline have been updated. Please see "Company Outline" shown above.

	April 1st, 2008
	We established a new company and changed our corporate name to Sumitomo Metal Mining Engineering Co., Ltd. For details, please see "Company Outline" shown above.

	April 1st, 2008
	Details of Head Office and branches have changed. For details, please see "Company Outline" shown above.

	April 1st, 2008
	Operation contents have been updated. Please see Overview of operations shown above.