Honestly jdramas are solely for surreal and gag comedy. they can make a batshit laughing scene even in extremely critical situations which would be disastrous in real life.
kdramas are more romantic, cringey, corny, slow pace, emotional, crying and not really "comedy".
┼ = read the manga/watch the anime as well
╩ = surreal gag comedy aka the japan comedy
┌ = top notch good
╦ = blood or gore or deep ass psychology or tragedy
I will list down my favourite jdorama and movies,
1 Litre no Namida (no surreal gag comedy, this is really sad and tragic)┌╦
3 Nen A Gumi: Ima kara Mina-san wa, Hitojichi Desu ╦ ╩
Ajin: Demi-Human ┼┼
All Esper Dayo! (sex comedy) ┼╩
Anger
As the Gods Will ┼┌╦
Battle Royale ╦
Blue Spring Ride ┼┼
Daily Lives of High School Boys ┼╩
Tsuugaku Series Tsuugaku Densha
Ekusute ╦
Impossibility Defense ┼╦
School-Live! (dont be blinded by the cover) ┼┌
響 HIBIKI ┼┼┌╦
Hidamari ga Kikoeru - Theory of Happiness ┼
Boku no Hatsukoi wo Kimi ni Sasagu ╦
Jimi ni Sugoi! Koetsu Garu Kono Etsuko ╩
Kanojo wa Uso wo Aishisugiteru ┼ (jap ver>kor ver)
Kimi wa Pet ┼┌┌ (2003ver > 2017ver > korean ver)
This guy is the biggest mistake in my life ┼╩
Scum's Wish ┼┌╦
Litchi Hikari Club ┼╦
Tonari no Kaibutsu-kun ┼╩
Fake Love ┼╩╩
Ossan's Love ┌╩
Pichi Garu ┼╩
Ranma 1/2 ┼┌╩
Second Love
Sora wo Kakeru Yodaka ┼┼┌╦
Tomie Unlimited ┼┌╦
I'm Inside Mari ┼┌╦
Honogurai mizu no soko kara ┌ ( has an american remake)
The Misunderstanding of Sunny Girls and Cloudy Girls ┼
I Want to Eat Your Pancreas ╦
Full Throttle Girl ┌╩
Gisou Furin
Otomen ┼╩
Hitsuji to Okami no Koi to Satsujin ( i havent watched but) ┼┼╦