A 28-year-old Thai woman remains detained in Japan after crystal meth was found in coffee sachets inside a parcel she was paid to carry, as her family asks police to trace the sender.

Japanese police have arrested a 35-year-old Taiwanese man accused of smuggling more than 3 kilogrammes of methamphetamine from Thailand to Fukuoka Airport, with the drugs allegedly concealed in beverage packaging and valued at around 160 million yen, or about 33 million baht.