OK,so the saddest jdrama that I've watched were two
1.Koizora-I cried at this one more then at the Titanic..I mean the emotions were tranffered right at me..I've cried when Hiro was talking through the phone with her and then he died before she could get at him..

I also cried when she arrived at the park when she put those tiny shoes for the dead baby and after that she find out about Hiro's illiness
2.Why why Love-with my fav actors[Mike He,Rainie Yang] they were plenty sad moments..but the saddest was at the end