A recent study explores the relationship between adverse childhood experiences (ACEs), dark personality traits, and Internet trolling. Japanese participants (N = 447) completed questionnaires on ACEs, dark personality traits, and Internet trolling. The results reveal that ACEs, psychopathy, and everyday sadism were positive predictors of Internet trolling. Furthermore, these dark personality traits were found to be significantly associated with increased Internet trolling only in individuals with high ACE scores. These findings have implications for strategies aimed at reducing antisocial behavior online.