Five years after their conception, Japan's Constitutional Democratic Party and National Democratic Party are facing divergent political situations. While the Constitutional Democratic Party has grown in stature, considering the changing political landscape in Japan, the National Democratic Party struggles to find a foothold. This comes amidst increased discussions about political coalitions and intra-party dynamics.

In Japanese politics, party influence and coalition partnerships have long played a critical role in shaping the country's political landscape. These dynamics, along with the leadership styles at the helm of these parties, are driving the discourse regarding the future of Japanese politics. Both parties' progress after five years since their formation is of significant interest to the public, the media, and political scientists.

In the US, party fortunes also swing over time, affected by various social, economic and international factors. However, the two-party system in the US contrasts Japan's plural-party system, making the party dynamics unique in each country. In EU countries as well with multi-party systems, party alliances can have substantial impacts on the political scene.