It doesn't have to be japanse, it can be any drama seriously as long as it has the same or smiliar theme :s Thanks! ^^
1 Litre of Tears is the first that comes to mind. ^^
A Millionaire's First Love- This is a movie though
Scent of a Woman and Bad Couple, both dramas.
some illness themes - 90 days of love (warning besides the fact that he is dying they are also blood related cousins and in love) a thousand day promise (she has Alzheimer's) autumn tale sorry I love you
With illness I say 1 Litre of Tears and Taiyou no Uta (drama and movie). Also if you like teen pregnancy 14 Sai No Haha. Also if you are looking for a drama/romance drama I'll alo recoment Innocent Love and Nagareboshi. *.* Good luck =D
Autumn Tale, Foolish Mom and Mr. Goodbye. But if youre looking for this kind of theme like Koizora then I can recommend Autumn Tale. The other two have that kind of theme but on the same time not. Those can you find on gooddrama and drama.net! :)