The first international training program, entitled the 118th International Training Course, was conducted from May 21 to July 12, 2001. The second program was the 119th International Training Course, conducted from September 10 to November 1, 2001. The main themes were “Best Practices in the Institutional and Community-Based Treatment of Juvenile Offenders” and “Current Situation of and Countermeasures against Transnational Organized Crime,” respectively. Papers contributed by visiting experts, selected individual presentation papers from the course participants, and the reports of the courses are presented in this issue. The subject matters of the visiting experts’ papers include international cooperation against transnational organized crime; extradition and mutual legal assistance in criminal matters; the experience of the European Union; and criminalizing participation in an organized criminal group. The situation of transnational organized crime in the Philippines, the provisions of the United Nations against transnational organized crime, and the decision to develop international convention and the negotiation process are also discussed. The visiting experts also provided an overview and case study of electronic surveillance in the United States. The participants’ papers discussed the current situation of organized crime in Honduras; the Indian perspective on transnational organized crime; the current situation in relation to corruption in Malaysia; and transnational organized crime in Thailand. The reports of the course included an analysis of the current situation of illicit drug trafficking, illegal firearms trafficking and human trafficking, and money laundering. Also discussed were the tools facilitating the investigation of illicit drug trafficking, the criminalization of participation in an organized criminal group (conspiracy, immunity, and witness and victim protection programs), and countermeasures against money laundering. Appendix