Illicitly manufactured drugs in various parts of the world are trafficked across the countries, and once they reach final consuming market countries, their price rises to tens or hundreds of times as much as in their origins. Drug trafficking organizations, with the purpose of making the huge illegal profit, smuggle drugs through the various routes with different methods. Being one of the most lucrative markets where drugs are traded for very high prices, Japan is targeted by drug trafficking organizations from all over the world.
Under such circumstances, Narcotics Control Department conducts investigation in coordination with foreign law enforcement authorities from various countries, aiming to shut down illicit flows of drugs . Narcotics Control Department also contributes to ensuring coordinated international response to drug problems, by participating in the UN Commission on Narcotic Drugs (CND), the Meeting of Heads of National Drug Law Enforcement Agencies for Asia and the Pacific (HONLEA), and various project meetings convened by the United Nations Office on Drugs and Crime (UNODC) and the International Narcotics Control Board (INCB).