BackgroundSince the 1960s, women’s social and political engagement in Japan has been closely tied to the roles of mothers and housewives. On the other hand, the country is undergoing considerable demographic changes and has come to be considered an aging society, where an increasing number of women are opting out of marriage and child-rearing. Drawing from qualitative research with women in managerial positions in solar energy communities, this article explores the complex maneuvers informants conducted to fulfill their goal: the expansion of renewable energy in Japan.ResultsThe empirical findings point to a new, and underexplored perspective: of aging as a catalyzer for transgressing certain norms and expectations on female behavior in the context of grassroots mobilization. Aging tends to be axiomatically represented as a time of decline, and unidirectional consumption of communal resources. I examine how transitioning from life stages centered on careers and child-rearing offers resources that my informants draw on to sustain their engagement in solar energy communities. I further examine how my informants carefully, and paradoxically, navigate gendered expectations by actively appealing to dominant narratives on women: as attentive communicators attuned to the needs of others.ConclusionsThe article provides suggestions for further diversifying Japan’s community energy landscape, such as (a) increasing awareness of inequalities through open discussion on the topic; (b) gender-inclusive quotas on boards; (c) creating peer-mentoring networks; (d) stimulating a culture of dialogue open to dissensus; (e) shifting the focus away from women needing to make behavioral changes; and (f) not idealizing how much can be achieved without generating discomfort.