NDB Internal Audit Office is an independent unit under the board of Directors. There are three auditors including the internal auditing officer and two auditor. According to the「Corporate Governance Best Practice Principles」that the appointment and removal of the internal auditor must be approved by the Board of Directors or must be submitted by the internal auditing officer to the chairman for approval. The「Corporate Governance Best Practice Principles」has been uncovered in the company’s website. The auditing officer reports audit performance to chairman and president on a regular basis and attends the board of directors meeting to report the situation of internal control in the Corporation. The purpose of internal audit is to assess the internal control systems of the Corporation and its subsidiaries.