The research was conducted involving eight JSL students for 3 months. The subjects participated in Shadowing Activity (a task of listening the recorded text and repeating it as exactly as possible). The subjects' speech was recorded as they repeated the recorded text. The analysis of the collected data has revealed that (1) there are lots of errors in the repeated text; e.g., overuse of NO and mis-use of WA and GA, and (2) the subjects made production errors even though they heard the Japanese input correctly during the shadowing. The finding indicates that Shadowing Activity could be useful not only for training second language learners' production skill but also as a research tool in investigating the problems of learning such as the phenomena of fossilization.
