The justification presented for all this censorship is essentially that they are way too lazy to tailor it to every country's restrictions so They only took the harshest ones and applied it throughout the world, but quite a few of such manga are offered uncensored on other apps and Manga Up does

If the regional Public Safety drive which protects Japan from devils arrive to the scene, Denji is provided an ultimatum: to die at their fingers for a devil, or to sacrifice his flexibility to operate for them, using his special powers to become a devil hunter. Denji accepts the latter, naturally.