Dear Valued Partners,

We hope this message finds you well.

We would like to express our sincere appreciation for your continued support and partnership.

We are pleased to inform you that, effective October 1, 2025, our company name has been officially changed as follows:

Former Company Name: Mitsui Mining and Smelting Company, Limited

New Company Name: Mitsui Kinzoku Company, Limited

Please note that there are no changes to our business operations, address, or contact details. We kindly ask for your continued support and guidance under our new name.

Sincerely,

Mitsui Kinzoku Company, Limited