The aim of this study is to empirically analyze the impact of justice on long-term orientation and logistics performance in the relationships between firms within the supply chain. Specifically, justice is categorized into distributive justice, procedural justice, and interactional justice. This study particularly concentrates on interactional justice, which pertains to the quality of interpersonal treatment. To investigate their correlation, a survey was conducted among employees working in departments related to supply chains in South Korea, resulting in a total of 350 valid questionnaire responses. Subsequently, the hypotheses were assessed using structural equation modeling with SPSS 18.0 and AMOS 18.0. The findings of the study are as follows: The subfactors of interactional justice, such as interpersonal justice and informational justice, both had a positive impact on long-term orientation. Furthermore, long-term orientation positively influenced logistics performance. Based on the aforementioned results, the following conclusions can be drawn: Long-term orientation among firms in the supply chain plays a pivotal role in enhancing logistics performance. Given that the perception of justice heightens the likelihood of such long-term orientation, firms in the supply chain must take this relationship into careful consideration.