The Japanese Prime Minister's reference to an "existential crisis", has triggered a wave of dissatisfaction from China. While the exact context of the Prime Minister's remarks is unclear, the reaction it has provoked from China suggests it may be connected to an issue of diplomatic contention between the two countries. There is currently speculation about what this could mean for future Japan-China relations.

The Prime Minister's words, and the reactions they elicit, are closely watched in Japan. Their relations with neighboring nations, especially powerful ones like China, are of critical importance. As such, the Prime Minister's geopolitical statements can influence Japanese public opinion and their overall national and international policies.

In the US or EU, similar situations can arise where statements from leaders stir international controversy. However, diplomatic responses and public opinion can vary greatly depending on the political climate, the countries involved, and the specific issue at hand.