The Tochigi robbery-murder case dominated the day, with a fourth 16-year-old suspect arrested by late morning, bringing the total to four teenagers in custody. The arrests unfolded throughout the day, with media noting the suspects were high school classmates and highlighting possible involvement of 'tokuryu' (anonymous fluid criminal groups). Meanwhile, the University of Tokyo's May Festival was canceled on May 16 after a bomb threat targeting a speech by Sanseito's Kamiya, but organizers decided to resume on May 17 with security checks. The Trump-Xi summit aftermath continued to generate coverage, with Trump stating he made 'no commitment' on Taiwan and that weapons sales to Taiwan would be decided 'soon.' The government's early consideration of a supplementary budget also received attention.