Academic Publisher Recalls Book Over AI-Generated Nonexistent Court Cases

A prominent Japanese academic publisher has withdrawn a book from circulation after discovering that AI-generated research produced fabricated legal citations that never existed, highlighting critical gaps in verification practices as generative AI becomes increasingly embedded in scholarly work. Koubunken, which published "The System of Irresponsibility and the Battle of Okinawa" by Ryukyu University professor Shimabukuro Jun in September 2026, announced on September 24 that pages 147–149 contained three cited court cases that had no basis in reality. The author had used AI to search what was presented as Stanford University Library's International Criminal Court database for "international court precedents related to spy-related civilian killings in the Okinawa War," but failed to verify the results before incorporating them into the manuscript.