Shimoneta: A Boring World Where the Concept of Dirty Jokes Doesn't Exist (下ネタという概念が存在しない退屈な世界 Shimoneta to Iu Gainen ga Sonzai Shinai Taikutsu na Sekai), is a Japanese Light Novel series written by Hirotaka Akagi and illustrated by Eito Shimotsuki. Shogakukan has published nine volumes since July 2012 under their Gagaga Bunko imprint. Shimoneta is also a Japanese word for "vulgar slang" or "dirty joke", "blue joke", "erotic topic."

In a dystopian future, the Japanese government is cracking down on any perceived immoral activity from using risque language to distributing lewd materials in the country, to the point where all citizens are forced to wear high-tech devices called Peace Makers (PM) at all times that analyse every spoken word and hand motions for any action that could break the law. A new high school student named Tanukichi Okuma enters the country's leading elite "public morals school" to reunite with his crush and student council President, Anna Nishikinomiya. However, Tanukichi quickly finds himself entwined with the perverted terrorist "Blue Snow" ("Tundra's Blue" in some translations) when she kidnaps and forces him to join her organisation, "SOX," in creating and spreading pornographic material across the city as a form of protest against the regulations.

A manga adaptation with art by N' Yuzuki began serialization in Mag Garden's shōnen manga magazine Monthly Comic Blade from May 2014. An anime television series adaptation by J.C.Staff aired from July 2015 to September 2015.

Tropes used in Shimoneta include:
  • Adults Are Useless: They were the ones who allowed the current state of affairs to happen in the first place. And the ones critical of it, like the father of the terrorist Blue Snow simply kept quiet, allowing the madness to continue unabated.
  • But Not Too Foreign: Anna, who's implied to be of Western ancestry.
  • Crap Saccharine World: Everything looks orderly, peaceful and moral on the surface. Never mind the authoritarian censorship or the Unfortunate Implications stemming from how Japan's youth have no real idea of what sex even is thanks to said authoritarian censorship.
  • Enter Stage Window: Hyouka Fuwa does this to get into a building she wasn't allowed in.
  • Gag Censor: Except the russian vs japanese condom scene, this is shows up a lot in the Funimation version.
  • La Resistance: SOX, or at least that's how Blue Snow sees it.
  • Moral Guardians: Have become so influential that anything remotely "immoral" is persecuted.
  • Political Correctness Gone Mad: Satirized, especially as it takes place in a world where censorship, political correctness and moralism have become the norm.
  • Poor Man's Porn: Porn is considered contraband and hard porn is particularly difficult to acquire. As a result, the perverted terrorist Blue Snow shows a video of flies "body-melding" and dubs it.
  • Reality Ensues: The series does show the darker sides of what Political Correctness Gone Mad would look like when enforced for a prolonged period of time, which can make for some Mood Whiplash moments. Particularly in one scene where Anna almost rapes Tanukichi, not knowing how to handle her repressed sexual urges.
  • Spiritual Licensee: Shimoneta is pretty much a more risque version of Demolition Man especially with its satire on political correctness.