I haven't seen many historical jdrama, just a few.
I recommend "Tempest" (there is also gender bender) and "Jin" (with time travel). I haven't completed Jin 2, but I really liked the first drama.
Edited:
Ok, just checked my Drama List and I've only completed 3 historical jdramas. I want to watch more dramas, but the ones I try are usually too much detailed. I mean, they spent a lot of time introducing characters, there are too many references to history and I get tired.
Do you recommend Yae no Sakura? It is in my PTW list.