Amid growing tensions in one of the world's most critical waterways, Iran has hinted at retaliating against a U.S move to blockade Strait of Hormuz. This narrow sea passage is vitally important to the global oil trade, with a considerable amount of the world's oil supply transported through it. If Iran were to assert control over the strait, it could cause a seismic shift in geopolitical dynamics and potentially disrupt global oil supplies.

This news has significant implications for Japan as it relies heavily on imported oil through these trade routes. The Strait of Hormuz is a critical lifeline for Japan's energy needs, and any conflict in the region can impact Japan not just economically, but also in terms of energy security. It's a delicate international issue which people and government are watching closely.

Similar issues would also highly affect the U.S or EU as both have robust trading in the region. However, while the EU might take a more diplomatic and collective decision-making approach, the U.S has a history of showing a more unilateral and assertive foreign policy, which is currently displayed by its move to blockade the strait.