Recommendations

The story of childhood friends who are in love with eachother, and of course the third parties that they meet along the way (love triangles! or squares?)
Both have a similar air, where they are not that extremely dramatic or serious but are light hearted in a sense.

I loved both for the strong bromance that they presented. In both dramas, I felt myself rooting for the guy best friends more than the actual main guy/girl relationship. Both dramas, have a nice balance between lightheartedness and addressing serious issues. Either way, it's hard to love one without loving the other!

As I was watching Mask, I kept thinking it's kind of like Secret. Then I found it's from the same writer. The main thing about both is the evil guy is really evil.

Kim Eun Hee is the genius writer who wrote Signal and she is also the one who wrote Sign. Sign is also one of the best crime thriller dramas out there. If you are looking for something as good as Signal then you should definitely watch Sign and vice versa. Both dramas are blessed with excellent unforgettable plot, perfectly written characters and TOP actors. Sign has Park Shin Yang as the main lead and he is one of the best top notch actors. Both dramas gained high TV ratings and a must watch dramas.

Both of these dramas star Jang Hyuk as the male lead, and while the plots are not the same, they are both feel good romantic comedies.

The supernatural theme of the story. Mushishi is much more passive than Gegege no kitaro. The actors: one is younger than the other. Might seem like one is the past and one is the future.

Cheap kind of film so both are not top quality. Both leaves unsatisfied feeling after finishing it. Not as bad.

Similar drama style; can't describe the similar feeling as the director does it.

Action and psychological with super enhance humans. Of course, an epic battle scenes ensures.

Life does not always give you lemon. Took place in China; both actors and actress goes through history (war, famine, reconstructions).

realism time. Both are about the vulgar human times. It's sad, but very real. Kind of dirty in the style of the movie.

Ridiculous storyline that works. It's funny and have a good among of fighting to keep people entertained.
Tai Chi Zero is the prequel to Tai Chi Hero

Ridiculous storyline that works. It's funny and have a good among of fighting to keep people entertained.

Realism time. It's the weird effect that both movies give out. There are mixed feelings. Somehow similar concepts that make audience see the real humanity.

Both are comedy. The actors are funny and the pairs are cute. Both guys have their own unique trouble to deal that are both initiated and resolve because of the female lead.