Strategies and strength of ijime (bullying) prevention in Japan have differed among prefectures and cities. The Japanese Government encouraged ijime-prevention after each media focus on ijime-suicide, however, the lack of specific Acts and strategies may have led to a failure to prevent subsequent tragedies. In recent years, various kinds of intervention programmes to tackle ijime and other problems in schools have been introduced, acculturated and evaluated in schools, supplying options for teachers. These are reviewed. It is argued that to avoid unwilling conflicts among those methods and overloading of teachers, a theoretical framework and system to organise the implementation would be necessary.