Group-norm succession motivation refers to motivations for passing down group norms to the younger generation. The current study compared the effects of group identity and individualism/collectivism on group-norm succession motivation between Japan and the UK. Eighty-four university students from Japan and 132 university students from the UK were included in the analysis. The results showed that group identity positively influenced group-norm succession motivation in both Japan and the UK. Group-norm succession motivation seems to be promoted by the following two routes: responsibility for the younger generation and hoping they experience happiness and showing superiority over the younger generation.