Unnatural

Both are procedurals involving forensic doctors, and Satomi Ishihara stars in both (although in Unnatural she plays a doctor and in Bull Doctor she plays a detective).

Both are dramas which emphasizes the importance and value of dead bodies. Both dramas have characters who ridicule the main characters occupation as being disrespectful to the doctors who care for living bodies. Yet the main characters stick through these accusations and continue to work as hard as they can.

By the same screenwriter. They both are mysteries that are handling unsolved cases or deaths. You learn to love each character as they solve each case leading to the main case of the main lead or the side characters.

Both dramas is about forensic pathologists involve crime solving and one of the leads have tragic past.

Both are mystery dramas about uncovering the truth behind a case. Both go beyond simply solving the mystery, exploring the people involved, their relationships, secrets and personal struggles.

Both are character-driven, with plenty of mystery and plot twists. They also explore the people behind the cases rather than focusing only on finding the answer.

They're quite different in structure and tone though. Unnatural follows a forensic pathologist investigating different unnatural deaths, with each case telling its own story. It's more emotional, with a strong focus on the lives of the people involved and the stories behind each death.

Connection follows a police officer investigating one main drug-related case throughout the drama. It's darker and more intense, with more action and a stronger focus on crime, secrets and complicated relationships.

Both are emotional medical dramas that explore death, loss and the lives behind each case. Both use individual cases to tell stories about the patients or people who have died, as well as their families and loved ones.

Both focus heavily on a central lead, with an FL in Unnatural and an ML in Doctor John. Both explore difficult questions about life and death, with plenty of heartbreaking, warm and healing moments.

They're quite different in focus though. Unnatural follows a forensic pathologist investigating unnatural deaths and uncovering the truth behind them. Doctor John follows a doctor specializing in pain management and focuses on patients living with pain and illness. Doctor John also has some mystery elements, though they are less prominent than in Unnatural. It has a stronger focus on romance and medical ethics.

The shows have the same executive producer, Hiroki Ueda, and you can immediately tell when you watch unnatural that he was trying to recapture the same magic of Keizoku. The character dynamic between the leads in both shows have the same vibe and the over arching mysteries that connects the flow of the shows have the same structure. If you watch one you'll see the resemblance in the other.

Both are Japanese Crime Drama Thrillers solving One Case per Episode.
(Though one has police officers as main leads and another with forensic expert as main lead)

Both have team work n members helping the main lead(s) while working on the cases.

Crime drama ardent lovers will definitely enjoy both and crave for more seasons and more cases for both the dramas

(My rating for both is 9.5 )

Though very different in tone and length, both titles can help non-Japanese people get a bit of insight on how the dead and the people who work with them (pathologists and norikan) are regarded in Japan.

Both are crime dramas with MEDICAL INVESTIGATIONS' point of view.
Both have a FORENSIC EXPERT as a Main Lead.

Story is told / main investigation is conducted through the eye of a forensic examiner
and so the detective work is started with the forensic expert visiting the crime scene
(which is usually visited by police detectives and forensic team collecting evidence. A forensic examiner is an optional to visit the crime scene, it seems)

Tell us about madic but deference section. Medic group that we never pay attention. And even us same actor.

Both dramas shows the use of forensic pathology to solve crimes and catch the killer. While unnatural death solely focuses on the forensic part, Dr Qin includes police work too.
Both have excellent female leads but Dr Qin is more graphical.

Both series focus on finding out what happened to deceased individuals. Move to Heaven takes a more sentimental approach, as they run a company that cleans out/takes care of the belongings. Unnatural is a bit more serious as it follows coroners and their discoveries. While different in occupation, I found both to be similar as they don't just simply solve the mystery of death, but more complex things going on in the person's life.

Both are mystery/crime dramas that follow different cases and uncover the truth behind them. Both go beyond solving the cases, exploring the people involved, their lives, relationships and personal struggles.

Both balance mystery with emotional and character-driven stories, while also exploring the leads' own struggles and inner thoughts.

They're quite different though. Unnatural follows a forensic pathologist investigating unnatural deaths, while Murder Diary follows a police officer with multiple personalities, with his different identities working together to investigate cases. Murder Diary is darker and more psychological, with a stronger focus on the characters' inner worlds and romance.

Both drama involved with Forensics Pathologist, story about how they tried to reveal the truth behind unusual deaths.