In American cinema classification (MPAA CARA) and international standards, PG-13 allows vast destruction of buildings and robotic or alien beings (e.g., standard Marvel or Transformers films). However, when a colossal disaster film depicts the tangible, visceral crushing of human beings, realistic flash burns, screaming stampedes without heroic rescue, and stark historical parallels to atomic warfare, CARA classifies the tone as "sustained terror and human peril," triggering a mandatory R-rating. As director Takashi Yamazaki stated at the NYFF: “There were certain scenes that, for me as a director, were so essential to the film. Censoring it or cutting it was just not an option for me.”

Each scene is evaluated on four weighted dimensional vectors: Physical Carnage (35%), Gore & Graphic Trauma (30%), Terror & Bleak Atmosphere (25%), and Profanity/Language Rules (10%). For an MPAA PG-13 certification, no single scene can sustain an intensity composite above 68/100, nor can more than one non-sexual harsh profanity exist. Applying the "Director's Vision" preserves maximum thematic fidelity at the expense of general-audience admission; toggling "Auto-Censor" simulates camera cut-aways, sound mix softening, and optical smoke overlays.