Many creators of Japanese media either lived through the Second World War, or have parents or grandparents who lived during the war. The atomic bombings of Hiroshima and Nagasaki left deep wounds on the Japanese psyche when it comes to the discussion of atomic weapons. If there is a weapon treated in a similar manner to nuclear ones but isn't referred to as such not because of censorship, but because it doesn't make sense in that setting, it's a Fantastic Nuke. Almost any series involving a Wave Motion Gun involves this. Compare Never Say "Die". Examples of Nuclear Weapons Taboo include: