The transition towards sustainable and just food systems is ongoing, illustrated by an increasing number of initiatives that try to address unsustainable practices and social injustices. Insights are needed into what a just transition entails in order to critically engage with plural and potentially conflicting justice conceptualisations. Researchers play an active role in food system transitions, but it is unclear which conceptualisations and principles of justice they enact when writing about food system initiatives. To fill this gap this paper investigates: (...) Which conceptualisations of justice emerge from the literature related to food system initiatives and which principles of justice do authors use? We developed an initial framework for which we drew on political philosophy literature. We then undertook an extensive review of the food system transitions literature using this framework and were able to identify a range of recognition, distributive, and procedural justice conceptualisations and associated principles of justice. Recognised as subjects of justice were those with a particular role in the food system, people who are marginalised, Indigenous communities, those with experiences of negative consequences of the food system, future generations, and nonhumans. The identified conceptualisations and the developed framework can be used by those involved in food system initiatives to reflect on how they conceptualise justice. We challenge them to be more explicit about who they do and do not recognise as subjects of justice and which principles of justice they use. Such clarity is needed to reflexively enact a just transition towards sustainable and just food systems. (shrink)