dramas are The Big Chill (1983) and St. Elmo's Fire (1985). The "trendy" formula was invented in the late 1980s when screenwriters decided to reach the television audience with themes that covered real-life Japan, at a time when the Japanese were experiencing a bubble economy. The "trendy" formula was improved in the early 1990s, when the story lines changed with the times. By gambling on harder issues, including teenage violence, child abuse, and modern family life, the trendy drama formula is tweaked to fit the television viewers' changing taste. Even today, the success of Japanese dramas is a result of sticking with the trendy drama formula. Many of these shows employ young actors who use them as springboards to bigger projects. Although some people consider Super Sentai and tokusatsu type shows as dramas, they do not fit the "trendy" definition. Generally, most evening dramas aired nowadays are "trendy dramas", and the term does not apply to other types of dramas such as asadora. Difference in focus between networks Dramas that are broadcast on Fuji Television (Fuji TV), NTV, and TBS are generally the most popular in any given season. Fuji TV is widely known as the inventor of the drama formula. During the 1980s and 1990s, Fuji TV popularized trendy dramas with their use of young and popular actors/actresses. The network's 9:00 p.m. dramas shown on Monday nights are commonly called "Getsuku" (a shortened phrase meaning Monday at 9), which historically have revolved around love stories. Although a popular time slot in the past in which dramas generally brought in high ratings during the season, the popularity of "Getsuku" dramas appears to have declined in recent years, with most dramas not crossing the 20% mark for average rating. Most modern "Getsuku" dramas have also abandoned the traditional love story format. Other Japan television networks have their own focuses. TV Asahi, for example, focuses heavily on jidaigeki and crime stories (famous examples of the latter are the long-running series Tokyo Detective Duo, now on its 21st season. Kasouken no Onna, now on its 21st season). NHK puts more effort into programming that reaches an older demographic, focusing mostly on epic period shows of historical significance, often with all-star casts, called taiga dramas, as well as inspiring dramas that focus on a young, strong-willed hero or heroine. Theme music and background music Theme music and background music set the overall tone of