The present study aimed to clarify the factors for the inheritance of language and culture from the second-generation Japanese–Indonesian to the third generation living in Indonesia. The participants were eleven Japanese-Indonesian men and women (20s-30s) with Japanese accessory (the second generation), besides their Japanese mothers (the first generation) married to Indonesian men and children (the third generation). This was part of a longitudinal study that was started in the early 1990s. Semi-structured Interviews and participants observations were mainly employed. The analysis was qualitative in nature, and two von eleven cases were especially focused. The results showed that the existence of the first generation (their Japanese mothers), the views of their spouses, especially wives on the language and culture of their children, as well as the enthusiasm of the second generation about the inheritance of the Japanese language and culture were important factors for the inheritance of the Japanese language and culture to the third generation
