Аннотация:This study examined the experiences of Japanese clinical psychology trainees in their graduate school with the aim of identifying factors that might enhance or hinder their learning and professional development. We analyzed the interview data obtained from 17 clinical psychologists using grounded theory approach. Two major category groups were generated: Developing as a Clinician and Difficulties. The primary positive learning experiences in Developing as a Clinician were labeled “Hot Learning,” in which trainees acquired professional knowledge and skills through close interpersonal engagement with clients, peers, faculty, and supervisors. In contrast, Difficulties involved trainees’ negative experiences resulting in feelings of self-doubt and incompetence. These experiences occurred in close but sometimes conflicted interpersonal contexts, where trainees felt evaluated in a manner incommensurate with the support they received. We found that the quality of interpersonal relationships, which provided the context for optimal learning for trainees, was paramount to the definition of positive versus difficult learning experiences. Implications for therapist training, professional development and future research are discussed.