Difference in Focus Between Dorama Broadcast

Doramas have been broadcasted in different TV stations. Each TV station has different focus. Check below information!
Dramas broadcast on Fuji Television (Fuji TV) and TBS are usually the most popular. NTV produces some popular dramas, too.

Fuji T.V. is widely known as the inventor of the drama formula. During the 1980s and 1990s, Fuji TV popularized the trendy dramas with their use of young and popular actors/actresses of that time. The network's 9:00 p.m. dramas shown on Monday nights are commonly called "Getsuku" (a shortened phrase meaning Monday at 9). The dramas usually involve a love story. It is considered to be a very popular time slot for dramas, generally bringing in a high rating during the season. However, in recent years, the popularity of "Getsuku" dramas has worn off, with most dramas not crossing the 20% mark for average rating.

Other Japan television networks also have their own focuses. TV Asahi, for example, focus heavily on jidaigeki and crime-situated stories. NHK puts more effort into programming that reaches an older demographic, focusing mostly on epic period dramas 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.

Source: wikipedia