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Prime minister nominee Han Seong-sook speaks to reporters before entering her confirmation hearing preparation office at the Financial Supervisory Service Training Institute in Seoul's Jongno District on June 8. / Song Eui-joo

The nomination of Han Seong-sook as South Korea's next prime minister is expected to add a new dimension to ongoing debates over proposed revisions to the Criminal Procedure Act, particularly regarding the future of prosecutors' supplementary investigation authority.

Observers say Han's background as a business executive rather than a legal or political figure could make her more likely to defer to the presidential office and the ruling party's judgment than to play an independent role in shaping policy.

Some analysts suggest Han could function more as a policy messenger tasked with implementing an already established reform agenda than as a policy coordinator responsible for balancing competing interests among ministries and stakeholders.

The concerns come as debate over the future of prosecutors' supplementary investigation powers reaches a critical stage. Critics argue that the prime minister's role could become focused on advancing the ruling camp's policy objectives rather than mediating disagreements and building consensus.

Han arrived Monday at her confirmation hearing preparation office at the Financial Supervisory Service Training Institute in Seoul's Jongno District, formally beginning preparations for her parliamentary confirmation hearing.

Asked about her lack of political experience, Han told reporters that every prime minister is required to play a different role depending on the needs of the time.

"I intend to focus on understanding what is being asked of me and on solving the problems that I am capable of addressing," she said.

If confirmed by the National Assembly, Han will formally assume responsibility for overseeing the second phase of President Lee Jae-myung's administration.

One of her most immediate challenges will be overseeing follow-up legislation related to prosecutorial reform, including revisions to the Criminal Procedure Act prepared by the government's prosecutorial reform task force.

Political observers say Han may face significant pressure as she navigates differences between hard-line ruling party lawmakers and members of the legal community who have raised concerns about the practical implications of limiting prosecutorial powers.

Some analysts also argue that the timing of the debate raises broader questions about how a prime minister with a corporate background will approach major legal and criminal justice reforms that could reshape the country's judicial system.

President Lee added to the discussion during a press conference marking the first anniversary of his administration, indicating that the issue of prosecutors' supplementary investigation powers should be addressed through deliberations in the National Assembly.

As a result, the prime minister's role in coordinating views among the government, ruling party and legal community is expected to become increasingly important.

Nevertheless, some legal experts remain concerned that while Han possesses extensive experience in corporate management, she has relatively limited exposure to legal and judicial policy issues.

A senior prosecutor, speaking on condition of anonymity, said Han's status as a non-politician and non-lawyer could make it difficult for her to act as an independent mediator.

"There are concerns that she may end up simply implementing a predetermined policy direction rather than serving as an independent coordinator," the prosecutor said. "It may be difficult for her to establish a distinct voice in discussions over follow-up legislation related to prosecutorial reform."

                                                                                                         Jeong Min-hoon