I'm looking for a jdrama that has adults as the main leads I would like them to be in their thirties or older. It doesn't necessarily have to be focused only on romance. Something similar to Saigo Kara Nibanme no Koi or Kekkon Dekinai Otoko would do the trick. Does anyone have any suggestions? 

I can recommend J-drama 'Pride'. It should fit in with what you're looking for.

http://mydramalist.com/491-pride
You've watched almost 130 jdramas...There nothing much to be recommended....

Golden Bowl
If you like the interaction between Chiaki and Wahei in Saigo Kara , you'll probably like this one....The banter, the cheeky conversation almost like wahei and chiaki....just ignore the slapstick humor from the supporting characters...

Muri na Renai
Coming from the same writer as Kekkon Dekinai Otoko  with the same lead actress

Below are some of the  dramas that might catch your interest...


Love Revolution


hanayome-wa-yakudoshi

Sasaki Fusai no Jingi Naki Tatakai

Mou Ichido Kimi ni, Propose


I see you don't have Himitsu no Hanazono on your list yet. It's worth checking it out.

And there's also Priceless even though it's not that much of a romance, but it really is very good ^^
Thanks a lot guys! I'll be sure to check them out!