Since I was born, I heard so many songs which sing about a depression. There are 94 songs which have word of “???” in the lyric web site. Besides, my uncle who lived in Tokyo then often says that he wants to go back to the Bubble economy era. He said that he always moved by using taxi, and he purchased many expensive bags and accessories for his wife and his friends in the Bubble economy era. However I cannot believe them because he is eager to save money and he never buy me such expensive stuff, and also I felt the Bubble economy was so incredible one. Then, what is the Bubble economy and why it occurred ? What was the cause of the bubble economy? Before the Bubble economy, the early 1980’s, Japan experienced little booming economy called ??????. It drawned by Reaganomics in America, the yen became weakened against the dollar, thousands of Japanese products like consumer electronics was exported to America. Japanese industry gained its competitive edge by copying Western products, and improving upon them and selling them back to the West for cheaper prices, Japanese products was known to high quality and low priced then, they sold like hot cakes. On the other hand, American domestic industry was in financial difficulties because of it. By then, American manufacturing industry made a protest to improve the situation. As a result, The Plaza Accord was formed. The Plaza Accord is agreement which signed at the Plaza Hotel in New York City, was a pro-growth agreement signed by what was then known as the G-5 nations: West Germany, France, the United States, Japan and the United Kingdom. To make long story short, by lowering the value of dollar, they raised the value of yen. It was agreement to raise the price of Japanese products. The agreement had an immediate effect on Japanese economics. American consumer bought American products because Japanese product became high quality and expensive. Actually, the next day of the Plaza Accor