This study investigates the retention of Japanese as a second language in Korean elders' Japanese, which has been in a frozen state since 1945. Transcripts of conversations with young and middle-aged Japanese native speakers and questionnaires were used in the research. The following conclusions regarding aspect of Japanese existences were found as a result of this study: (1)In the case of the animate predicate, the dialect form ORU is the most frequently used. (2)Judging from the degree of contact with Japanese and their current Japanese ability, they use it together with ARU in lower than middle group, but use only ARU at the lowest group. (3)ORU, acquired from Japanese teachers, is often used to refer to teachers, but is neutral in formality. (4)The retention of ORU and the convergence to ARU are assumed to have occurred from 1945 until the present. (5)It is observed that ‘the fossilization of ARU’, ‘the cognitive linguistic reconstruction of RU-forms’ and ‘the use of ARU by L1(Korean) interference’ are the linguistic factors that brought about the retention of a system of Japanese existences.