Memoir of a Murderer (2017)

There are many similarities in terms of plot points and even the framing of shots. So much so that it’s clear that the makers of FOE had been influenced by MOAM. Giving examples would be giving spoilers. So I’ll just mention one. A car accident shown repeatedly as a flashback. Each time it’s shown, it reveals new information.

Medical, psychology, mental health, society, family, delusion episode, fears, functioning, action, Attention, clues,

Medical, attention, fears, action, psychology, errors, mistake, society, hospital, cruelty, killed, revenge, tragedy

Similarities include:
Unreliable storytelling from the protagonist
Connection of protagonist and antagonist
Thrill and suspense
Mystery
Will make you question if what you watched is what really happened
Plot twists
Amazing acting

Both movies very similar. You see everything from the main characters pov, but then suddenly your mind get's blown away by the amazing plot twist. (for plot twist: watch the last 20 mins of memoir of a murderer's directors cut.)

Former serial killer Byung Soo gets diagnosed with Alzheimer's. The doctor tells him that it's due to the aftereffects from a traffic accident 17 years ago; the same accident that stopped him from his killings and allowed him to live a normal life with his dear daughter. So when a series of murders occur near his town, Byung Soo gets worried whether the killings are his doing during his memory lapses. But then he comes across Tae Ju and instinctively realizes that he is the serial killer. He reports this to the police, only to learn that Tae Joo is one. Byung Soo tries to find firm evidence that Tae Ju is a psychopath, but only raises Tae Ju's interest in him and his daughter. And now with his memory slipping, Byung Soo must find a way to protect his daughter from Tae Ju.
(Source: ShoeBox)

the tragic pasts that the killers here have are similar and of course lead them to become serial killers. both films also feature the mystery of looking for murder victims even with different point of view. filled with riddles or even lies that make one wonder what really happened.

In both drama and movie, the main characters are investigating a murder related to themselves.
How Urashima Eiji doubts himself reminds me of Kim Byung Soo who wonders about himself.
Both drama and movie try to lead the audience to doubt the main character as they doubts themself.
And then the plot twists presented in both also remind me of each other.

If you are looking for the same kind of recommendation, you should definitely watch it. Also, Kim Nam Gil is the main actor in kmovie

Both of the main characters have Alzheimer's disease, they both keep fighting to serve a purpose, they both mainly center around family. They both are trying to value the memories trying hard for them not to fade away.

has an atmosphere similar to a garden or forest murder setting. full of gaslights which confuses what's really going on.

both movies are extremely thrilling, intense, and full of suspense. the narrative is misleading and it keeps the audience guessing till the end