Abstract
This study examines how native Japanese-speaking teachers judge the differences in Japanese-language levels of non-native speakers through conversation. Based on analysis of native Japanese-speaking teachers' comments of follow-up interview, two criteria were extracted. The first one is "Judgment based on observation of non-native speakers' speech", and the other is "Judgment based on self-reflection". Native Japanese-speaking teachers who have expertise in Japanese language education tended to use their expertise to judge the level of Japanese language of non-native speaker. Simultaneously, they also pay attention to the considerations they have generated during the conversation.
