Tokyo Metropolitan Police have arrested a 50-year-old Taiwanese woman on suspicion of smuggling over four kilograms of the designated illegal drug known as "zombie cigarettes" into Japan. This is the largest-ever seizure of the substance in the country. Liu is accused of violating the Pharmaceuticals and Medical Devices Act and of operating as a "mule" for a large-scale international drug smuggling syndicate. The Ministry of Health, Labour and Welfare added the drug to its list of banned designated drugs in May of this year.