I totally understand, I STRONGLY prefer Japanese dramas because they are short and to the point without being drawn out. Most of the Jdramas I've watched are between 20 to 30 minutes, a few 45 min, and between like 8 to 12 episodes. If you have a preference for romance dramas the selection will be smaller than Kdramas. If you don't really care about genre just start with the most popular ones you can find (you can sort japanese dramas by how popular they are) and start watching.
As far as
http://mydramalist.com/japanese-drama/3130/suugaku-joshi-gakuen It's a Hello Project drama, all the female actors are Idols and you pretty much have to be a fan to really appreciate some of the inside humor. I loved it.