Wilson Mach, Michelle Chen and Bobby Romero, from left, take part in an iaido martial arts class at the Emeryville Center of Community Life in Emeryville, Calif., on Monday, Dec. 9, 2024.

Wilson Mach, Michelle Chen and Bobby Romero, from left, take part in an iaido martial arts class at the Emeryville Center of Community Life in Emeryville, Calif., on Monday, Dec. 9, 2024.

According to the officials, the 70-year-old kendo club adviser holds a dan rank in the martial art of iaido. On the morning of March 5, he demonstrated the use of a real Japanese sword in front of ...