This study draws on Lemieux and Felson to estimate the risk of victimization per a million "personhours" for the crime of purse-snatching. The data used as the denominator are derived from the "People Flow Project" data for the year of 2008, developed by and managed at the Center for Spatial Information Science of the University of Tokyo. The purse-snatching data used as the numerator are derived from the official records of criminal incidents known to the Tokyo Metropolitan Police Department,

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... ooled for a 5-year period from 2006 to 2010. Results of the analyses are as follows: (1) the victimization risk of purse snatching per a million person-hours in Tokyo metropolitan area was 0.156 for males and 2.229 for females; (2) while the count of victimization incidents were highest among those aged 20-39, or those being employed, the victimization risks were highest among those aged 60 or over, or those being unemployed including housewives; (3) spatial distribution of victimization incidents and the victimization risks also differed from each other. These results strongly indicate that analyses that take the population exposed to the victimization risks into account are necessary to address the victimization of people in transit.