Ishiba Shigeru, a prominent Japanese politician, has advocated for the expansion of the UN Security Council during the UN General Assembly. Shigeru firmly believes that the Council's expansion would potentially enable more equitable global decision-making. His statements, although not unique, have rekindled interest in the long-standing debate regarding the composition and structure of the Security Council.

In Japan, this issue resonates significantly due to the country's place on the world stage, being one of the largest global economies and a significant contributor to the United Nations. Despite this, Japan has not achieved a permanent seat on the UN Security Council, a point of contention within the country's political and public discourse. Shigeru's call aligns with the nation's desire for more substantial global influence pertinent to its international status and contributions.

In the US and EU, discussions on the reforming the Security Council are shared yet varied due to their divergent international positions. The US has a permanent seat with veto power, while only two EU members, France and the UK, enjoy the same privilege. This difference can lead to complex reactions within and between these regions regarding Security Council expansion, depending on the potential impacts at the cost of their existing influence.