Overview
- Shizuoka Prefectural Police arrested 38-year-old Masaki Koyama at the scene on suspicion of attempted murder after workers restrained him.
- Fire officials said 15 male employees in their 20s to 50s were injured and all were conscious when transported, with about five possibly seriously hurt.
- Investigative sources said the suspect told police he had been bullied at the workplace.
- Police are examining reports that he carried a survival knife, wore a gas-mask-like item, and dispersed liquid with a sprayer, with victims found in multiple areas of the plant.
- Yokohama Rubber’s Mishima factory produces passenger and light-truck tires and had 987 employees as of December 2024, and the company has not commented as the inquiry continues.