Detective Conan

The basic premise of the show involves various crimes, usually murder, and while the actual crime committing is not always shown, there is a fair amount of blood visible, which can be disturbing for younger children. For instance, early chapters/episodes have been noted for being 'gory,' particularly the 'art museum thing' which gave one viewer nightmares. Attacks in the series are intended to harm individuals and often involve various weapons. Examples include the initial poisoning of Shinichi Kudo by the Black Organization, which transforms him into Conan, and numerous cases where victims are found with stab wounds, gunshot wounds, or other fatal injuries, even if the explicit act is not always depicted.

The primary romantic plotline revolves around Shinichi Kudo (Conan) and Ran Mouri, his childhood friend and love interest, with their relationship involving strong emotional connection, yearning, and occasional innocent romantic gestures such as implied kisses or blushing. While explicit nudity is rare, one user on Reddit mentioned "sometimes nudity (episode 754)" when discussing age appropriateness, suggesting isolated instances that might be considered suggestive or briefly expose non-explicit body parts in the context of a crime scene or a character changing.

Kogoro Mouri, Ran's father and a private detective, is frequently shown drinking alcohol, often beer or sake, and sometimes appears to be mildly intoxicated, contributing to his often bumbling and comedic persona until Conan uses his deductive skills through him. The central premise of the series involves Shinichi Kudo being forced to ingest a newly developed poison by the Black Organization, which instead of killing him, shrinks his body to that of a child. This poison, APTX 4869, functions as a drug-like substance that alters human physiology, driving the entire narrative.

Many episodes involve the discovery of murder victims, which, while not always graphically explicit, can feature blood and the unsettling visual of a deceased person. Some viewers have recalled being scared by early episodes, such as a case in an art museum, finding it 'scary' or giving them 'nightmares.' The overarching plot involves the dangerous Black Organization, a secret criminal syndicate responsible for Shinichi's transformation. Their presence and the threat they pose to Conan and his loved ones create a constant undercurrent of suspense and danger, escalating the intensity, as they are willing to 'remove threats to the organization by any means necessary.'

Conan Edogawa (Shinichi Kudo) constantly 'sends Kogoro to sleep and then relies the solution of the case via voice changer to the audience,' which is an ongoing act of deception and manipulation of an adult authority figure for the sake of solving crimes, often making Kogoro look competent when he is not. Adult characters, particularly Kogoro Mouri, are sometimes depicted hitting Conan on the head in frustration. While presented as 'physical humour,' this shows adults striking a child, which some parents might find concerning due to the portrayal of disrespect towards a child and physical punishment.