A Study on Japanese Acquisition, Education and Support in the Multilingual Environments

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Taking advantage of Japanese Association of Multilingualism established by our group, we have conducted and reported a number of researches in Japan and overseas. We have also held an international symposium on Simultaneous Multilingual Language Learning Support as an extension of our research.The following is a summary of our research as a whole:1. The real state of acquisition of the Japanese language in multilingual (Tagalog, English, Korean, Portuguese, Spanish and Chinese) environments was made clear from various points of research views such as (1) one person-one language and one environment-ore language hypothesis, (2) dominant language and thought language, (3) transition effects on multilinguals' perception of their language, (4) linguistic recency and language choice, (5) language use in contact situation, (6) multiple identities, (7) locative case marker and (8) tense and aspect.2. The status quo of simultaneous multilingual language learning and its program in Korea, China and Japan was discussed and summarized in an international symposium we held. Such program can be part of a new Japanese teacher education program.