Recommendations

Similar plot line. the father has an affair and as an act of revenge the woman switches the child, then neglects the child she took but the child grows up a bright child.

nirvana in fire and battle of changsha have that kind of masterpiece vibe , if you liked nirvana in fire you would definitly enjoy battle of changsha
- light sweet romance exists in both dramas.
- issues of politics and war exists in both dramas, battle of changsha looks more real and honest, it has no fiction, whereas in nirvana there are some fictitious events.

If you like mystery/thriller.... Balanced with a bickering romance and comedy.... The plot is amazing....

Great music as well.. You will enjoy it for sure, if you just focus watching it....

same feel of comedy and directing style
both manga based
high school rom-com
both movies have the female lead really love or pursue the male lead

same male lead - Kento Yamazaki ~ high school rom-com
L heart DK based on manga, two high school students lived in the same apartment complex and turn of events male and female lead will share the same apartment room.

There is no ghost but the same setting of culinary and food and romance. Great drama!

Love On A Diet has both male and female leads to be overweight and they both lost weight for the sake of love. Great movie! Andy Lau and Sammi Cheng!

same concept - older woman younger man but in Oh My Lady, both the male and female leads are single parents. good rom-com and did I mention SuJu hottie Choi Siwon is male lead :)

It seems most Johnny's rite of passage ~ older woman younger man drama - this time with Jun Matsumoto :)

Shinohara Ryoko once romanced ex-Johnny's hottie Jin Akanishi in this romantic comedy

hottie idol Kamenashi Kazuya falls in love with a beautiful older woman

Same genre ~ younger man falls in love with an older woman ~ romantic comedy

Ueno Juri and music! two different genres of music but both are still fun and light. There also Takenaka Naoto playing the role of a mentor in both

There are several similarities:
1. Main guy is a genius detective (or consultant)
2. The girl herself is not the run-of-the-mill bumbling, naive idiot- but actually smart herself; (well to a certain extent in the case of I Remember You).
3. There is a serial killer who keeps trying to lure the main guy

Obviously, there are many differences (far more in number than the similarities) but both are worth watching at least once.

BONUS: Love Me If You Dare has the most amazing AI that you can't help but fall in love with. That sass level and his banter with Wallace!

These movies are similar because both have young men some how becoming the caretakers of a baby. The male-leads both struggle with their new found responsibilities as a father and also have romantic side-plots. Overall they both have a similar feel with the comedic elements and feel-good family vibe they share.