It's truly unfortunate that you see it that way, as a lot of dramas are quite the masterpiece. Viki doesn't typically seem to get the license for popular dramas in Japan. If we're talking about something thats too unrealistic and would only happen out of manga etc. there are a lot of Chinese, Thai, and Korean dramas like that -ones that also happen to be very popular. (When you were sleeping, W, Coffee Prince, My girlfriend is a Gumiho, Scarlet Heart, Scarlet Heart Ryeo, U-Prince //practically every Thai drama...and this is coming from a half thai person. The storylines are generally recycled with one person being rich, one bring poor, an evil underhanded female rival, the caring parents, etc etc.) Still I find dramas from everywhere, except for China and Hong Kong usually just because they do a lot of fantasy genre dramas, and I'm not a fan of those, enjoyable.
If I may, I have some Japanese dramas that I'd like to recommend to you!
Love That Makes You Cry, Koinaka, Pretty Proofreader, H2(which is based off a manga, but it's realistic), Orange, Code Blue (all seasons), Tokyo Tarareba Girls, Pride, Ace wo Nerae (the live action drama), Tokyo bandwagon, Nobuta wo Produce, Ryuusei No Kizuna, Taiyou no Uta.