This paper investigates the report of Thailand's and Indonesia's Japan Overseas Cooperation Volunteers in order to know the present state of team-teaching by the Japanese native teachers (NT) and the non-native teachers (NNT). The results are as follows: 1) NT and NNT make use of their strong points and support each other. 2) NT and NNT's positions have a strong influence in the styles of team-teaching. 3) The purpose of team-teaching is not only for the students, but also to improve NNT's Japanese proficiency and teaching ability.
