Japan’s “Lost Decade” is the period of time after the economy’s bubble burst. The term was coined to refer to the years from 1991-2000, but the country’s stagnant economy has continued into the 2000s and led to some renaming it “The Lost Score.”
Source: https://www.discoverwalks.com/blog/tokyo/10-most-famous-historical-events-that-happened-in-japan/