Tsubo Imagery Therapy (Tajima & Naruse, 2000) was developed in Japan as a psychotherapeutic method that encourages individuals to confront distressing experiences while maintaining a sense of reassurance and safety. In recent years, the method has been adapted under open-eye conditions to enhance safety. While Tsubo Imagery Therapy with open eyes has been reported to reduce depressive symptoms in adolescence, the effect of the images it evokes during therapy remains insufficiently explored. This study investigated the relationship between depression and self-attention in university students, focusing on the content of the imagery elicited during Tsubo Imagery Therapy with open eyes. Thirty-two university students participated in the therapy, which involved imagining a container to hold the feelings and bodily sensations associated with their personal concerns. Participants were then asked to mentally modify or reposition the container to create a stronger sense of emotional safety, and to carry out these changes within their mental imagery. Participants completed the Rumination-Reflection Questionnaire (Trapnell & Campbell, 1999) before the therapy and the Self-rating Depression Scale (Zung, 1965), both before and after the therapy. Verbal transcripts of the imagery process were recorded and analyzed. Based on the results, the recalled containers were categorized into three types: "Fragile containers," "Non-Fragile containers," and "Containers with special effects." Analysis of variance revealed that those who imagined "Containers with special effects" had significantly higher rumination scores than other participants. In contrast, those who visualized "Fragile containers" or those who performed the positional change bringing the container closer, experienced a significant reduction in depressive symptoms. These findings suggest that, during the implementation of Tsubo imagery therapy with open eyes, it is important to focus on individuals' rumination tendencies and to support individuals who visualize "Fragile containers" or "Containers with special effects" while monitoring emotional changes throughout the imagery process.