On the 27th, the Liberal Democratic Party (LDP) and the Japan Innovation Party (JIP) confirmed their policy regarding the 'sub-capital concept' included in their coalition agreement, stating that the designation of a sub-capital will not necessitate the establishment of special districts. This decision aims to facilitate the participation of cities other than Osaka in the initiative, which was initially framed by the JIP's 'Osaka Metropolis Plan.' The two parties held discussions among their lawmakers to finalize related legislation for submission to the current session of the National Diet, with LDP lawmaker Suzuki Hidetake explaining that multiple methods will be available for establishing the sub-capital beyond just creating special districts.

The policy discussions reflected a significant shift after the recent House of Representatives elections, where the LDP achieved a historic victory, making it difficult for the JIP to maintain its previous stance. JIP representative Yoshimura Hirofumi, who is also the Governor of Osaka, previously argued that a sub-capital in areas with overlapping administrative functions between prefectures and designated cities would not be feasible. However, as the focus of negotiations shifted, the JIP conceded on the requirement of special districts to make the sub-capital concept accessible to various cities in Japan.

Despite this progress, challenges remain. The two parties do not hold a majority in the House of Councilors, which presents a barrier to the passage of related legislation. A member of the JIP stated that they have only just reached the starting line in this long process. The dynamics of the collaboration between LDP, which has legislators across the country, and the Osaka-centric JIP will be crucial in determining the future of Japan's sub-capital initiative and its implications for local governance and administrative adjustments in urban areas across the nation.