The TANAKA Precious Metals asks Sustainability Accounting Co., Ltd. to conduct third-party assurance to increase the reliability of the CSR performance data presented in the CSR Report. The details are mentioned below.

1. 1.Purpose

   Assurance procedures are carried out on whether the indicators of CSR performance in fiscal 2022 reported on Pages 28 to 30 of CSR Report 2023 were calculated in accordance with the standards specified by the company.

2. 2.Assurance procedures

   The procedures are conducted in accordance with International Standard on Assurance Engagement 3000 (ISAE 3000). The key procedures include:

   • Interviews with the personnel in charge of the company's calculation standards
   • Review of the calculation standards
   • Cross-checks with the data obtained through sampling and recalculation to determine whether the indicators were calculated according to the calculation standards

3. 3.Conclusion

   The assurance procedures have identified nothing indicating that any indicator on important matters was not calculated in accordance with the calculation standards specifie d by the company.