
A coordinated act of workplace violence unfolded at the Yokohama Rubber Company tire manufacturing facility in Mishima, Japan, leaving fifteen employees injured. A 38-year-old employee used both a knife and a chemical substance, believed to be bleach, in a dual-method assault that has raised urgent questions about security protocols in industrial environments, even in countries with low violent crime rates.
Story Snapshot
- A 38-year-old man attacked coworkers at the Yokohama Rubber tire factory with a knife and bleach
- 15 total victims injured – 8 stabbed, 7 affected by chemical spray
- 5 victims remain in critical condition following Friday’s assault
- The attack occurred at a major tire manufacturing facility in Mishima, Japan
Workplace Violence Strikes Japanese Tire Factory
A 38-year-old employee launched a coordinated attack at the Yokohama Rubber Company tire manufacturing facility in Mishima, Shizuoka Prefecture on Friday. The perpetrator used both a knife and what authorities believe to be bleach in his assault on fellow workers. Police arrested the suspect at the scene following the violent incident that left multiple victims requiring emergency medical treatment.
Dual-Method Attack Injures 15 Workers
The assailant employed two distinct methods during his rampage through the factory. Eight workers suffered stab wounds from the knife attack, while seven additional victims were injured when the perpetrator sprayed or threw a liquid chemical substance believed to be bleach. The combination of weapons created chaos throughout the facility as workers scrambled for safety during the unexpected assault.
Some of the stabbed victims remain in serious condition. A 38-year-old man was arrested for alleged attempted murder at the factory, authorities said.
➡️ https://t.co/VHJnaOIhLH pic.twitter.com/sVQEMpW4wX— euronews (@euronews) December 26, 2025
Critical Injuries Highlight Attack Severity
Five of the fifteen injured workers remain in critical condition, underscoring the serious nature of the attack. Emergency responders rushed all victims to local hospitals for treatment of their injuries. The severity of wounds sustained during both the stabbing and chemical exposure phases of the attack required immediate intensive medical intervention for the most seriously affected workers.
A man was arrested after stabbing eight people and injuring seven others
Security Questions Arise from Factory Incident
This workplace violence incident raises important questions about security protocols in industrial settings, even in Japan where violent crime rates remain relatively low. The ability of an employee to bring both a knife and chemical substances into the facility highlights potential vulnerabilities in workplace security screening. Manufacturing environments present unique challenges for preventing determined individuals from accessing materials that could be weaponized against coworkers during violent episodes.
Watch the report: At least 15 injured in chemical attack and stabbing at Japan tyre factory
Sources:
15 Injured in Knife Attack at Tire Factory in Shizuoka Pref. | Nippon.com.
At least 15 injured in a knife and chemical attack at a factory in Japan – ABC News














