Today`s globalized multilingual and multicultural society needs people talented with multilingual and multicultural competence. ``Simultaneous Multilingual & Multicultural Learning Support (SMMLS)`` is a language education program being developed to meet the needs. The surrounding environments of language education have been changing and any specific language education including Japanese cannot be self-contained to meet the need. We have to remove the walls between different language educations and need to address the challenge of SMMLS. Humans are born with competence to acquire multiple languages and the competence is kept all along the life span. Therefore, we have to tackle all kinds of language acquisition in a new paradigm of ``multilingual acquisition/multilingualism`` and not the paradigm of ``second language acquisition``. SMMLS is based on the theory of ``Simultaneous Multilingual Language Acquisition``. SMMLS can be practiced and create ``multilingual and multicultural classroom community`` and ``multilingual classroom culture`` where an ideal multilingual and multicultural society may be projected. It is expected that the significance of SMMLS can be widely recognized and that various educational institutes would practice SMMLS until it becomes local as well as national language policies.