In a dramatic change in the Forex market, the Japanese yen experienced a notable fall, with 1 Euro costing 180 yen at one point. This significant depreciation could potentially have profound implications on the overall Japanese economy and its international economic relationships. Further analysis is needed to examine the causes behind this sudden swing and its potential impact.

The strength and stability of the yen play significant roles in the Japanese economy. The depreciation of yen means that imports become more expensive, which could lead to inflation. However, it also means Japanese exports would be cheaper and more attractive to international buyers, which could boost Japanese businesses. Therefore, reactions are mixed in Japan with different sectors reacting differently to the situation.

When comparing to the US and EU, the impact of currency depreciation varies based on the economic structure. In the EU, a weaker Euro would similarly increase the cost of imports, but also make their goods more competitive internationally. The structural differences in the economies of the US and EU compared to Japan would result in different reactions to similar currency fluctuations.