Labyrinth of Hortensia and the Minotaur

Both are mysterious Japanese thrillers with eerie cinematography, where the male protagonist is searching for a missing sibling while getting caught up in a large conspiracy and taking serious risks.

Both revolve around sibling relationships, with the characters getting caught up in a mysterious pharmaceutical conspiracy and being chased. Both also have an eerie, mysterious cinematographic style.

Both revolve around unethical human experimentation carried out by shady doctors and its consequences for the characters, who are then hunted down to keep the truth hidden.

In Labyrinth of Hortensia and the Minotaur, the story involves human cloning, while in Henshin, parts of a killer’s brain are transplanted into an accident victim, causing the killer’s “mind” to gradually take over the victim's mind.

Both also share an eerie, mysterious cinematographic style.

Both are thrillers revolving around human cloning manipulated by a mysterious company, with the characters struggling to survive.

Both also have punchy ending songs. ;)