During the recent half decade, Japan's suicide rate at approximately 25 deaths per 100 000 people has been one of the highest rates in the world. From the perspective of suicide prevention by restricting access to suicidal means, the aim of the present study was to examine what kind of suicidal method increased during prolonged economic slump. During 21 years (1981-2001), for all suicide victims (5161 cases) the gender, age, and suicide methods were investigated. The yearly full unemployment rate was also used as a representative socioeconomic factor during the same periods in Japan using government statistics, and the relationship between methods of suicide and full unemployment rate was investigated. Pearson's correlation suggested that there was a significant correlation only for hanging rate (r=0.736, P<0.001), but not for the percentages of other methods of suicide. This finding that unemployed persons may have a susceptibility towards certain suicide methods could help in the prevention of suicides. Mental health in Japan should be given more attention, especially for the working population, and social programs offering help should be considered widely.