Abstract
Crowdsourcing games are games in which an unspecified and large number of people are asked to use their excess time to perform tasks necessary to solve various problems. There are four characteristics of crowdsourcing games: linkage with problem-solving, social contribution, task division, and human orientation. There are three problems wi th crowdsourcing games: yarigai exploitation, unauthorized use, and information leakage. Crowdsourcing games have some problems, but they have the potential to make good use of the surplus time and production capacity of an ever-increasing number of game players, and to realize a more affluent society.