Doraemon

In 'The Substitution Rope Story' (Episode 849), Shizuka and Nobita switch bodies using a gadget. Shizuka, in Nobita's body, takes a shower and finds herself naked, while Nobita, in Shizuka's body, struggles to fit in with girls' activities. The episode concludes with them realizing 'being in their own gender is the best'. Additionally, fan communities have generated 'headcanons' such as 'Nobita is secretly transgender' or 'Suneo is gay, and in the closet,' indicating a modern interpretive lens on character identities.

Nobita is a frequent target of bullying, often being beaten up by Gian. In the episode featuring the 'Violence Clock' (Episode 285, 'The Hardship Timer'), characters are compelled to physically attack Nobita against their will, with Shizuka even chasing him with a knife, which can be particularly disturbing. Another episode involves Doraemon getting an arrow through his head during a time travel adventure to a 'small war,' which he simply pulls out.

Nobita frequently and unintentionally stumbles upon Shizuka while she is taking a bath, a recurring gag noted as an 'inappropriate moment'. In 'The Dress-Up Camera' episode, Gian is depicted naked in the original Japanese version (though censored to underwear in some English dubs), and Nobita's underwear is revealed multiple times, contributing to suggestive themes. The episode 'Ah, Love, Love, Love!' involves Nobita using a 'cupid's bow' that causes various characters, including an 'ugly man' and Doraemon himself, to fall in love with Nobita, playing on themes of forced romantic affection for comedic effect.

In 'The Magic Dictionary' episode, Nobita uses a gadget to 'write down spells, incantations, or actions that will then come true,' leading to instances like his mother flying on a broomstick and Nobita gaining invisibility and telekinesis. The episode 'The Cursing Camera' depicts a camera that creates dolls, where 'whatever harm befalls the doll, will also happen to the person,' effectively functioning as a voodoo-like curse. Furthermore, the movie 'Doraemon: Nobita's Great Adventure into the Underworld' introduces 'Demon Lord Demaon' who 'taught mankind dark sorcery' and is portrayed as a 'Demonic Tyrant'.

The episode 'Drunken Lid' (Episode 752) features a gadget that enables users to experience intoxication from non-alcoholic drinks. Nobita, Doraemon, and Shizuka use this gadget for a 'drunken Cola' party, resulting in them 'dancing mindlessly.' Nobisuke (Nobita's father) is also seen getting drunk on beer. This episode was controversial and banned in some regions for 'promoting underage drinking'. Additionally, Nobisuke is depicted smoking, a habit that was reportedly toned down in later series adaptations, indicating its presence in the 1979 version.

The episode 'The Fear of Tincture' (Episode 919) involves burned comic books turning into ghosts that terrify Nobita's mother, and later, Nobita's own ghost seeking revenge on him. Another episode, 'The Violence Clock,' escalates to a point where Shizuka is forced to chase Nobita with a knife, creating a genuinely high-tension situation. The movie 'Doraemon: Nobita's Great Adventure into the Underworld' also features a 'Demon Lord Demaon,' contributing to a more intense, supernatural threat.

Nobita routinely shows disrespect towards his parents and teacher, often complaining about chores or homework and attempting to avoid responsibilities. In 'The Mad Watch' episode, Nobita actively complains about his mother's 'grumbling' and uses a gadget to manipulate time during her scolding, highlighting his rebellious attitude. A particularly stark example is 'The Dictator Switch' (Episode 101), where Nobita uses a gadget to erase people, including Gian and Suneo, from existence out of frustration, showcasing extreme defiance and disregard for others' autonomy.