This article updates the trends and developments of Japanese as a second language (JSL) research since Mori and Mori (2011) by reviewing nearly 200 selected empirical studies published in English or Japanese between 2010 and early 2019. The first section of this review examines the cognitive aspects of second language (L2) Japanese development, focusing on vocabulary and kanji (i.e., Chinese characters transferred into Japanese) learning, syntactic development, and the issues surrounding reading and writing. The second part investigates sociocultural issues in L2 Japanese development and use, including pragmatic development, multilingual/translingual perspectives, and multilingual youth. The third section explores the role of affective variables (primarily learner motivation) in L2 Japanese development. The last section considers various pedagogical issues, including corpus-based studies and the development of materials and resources, instructional designs and classroom studies, technology-enhanced language learning and new instructional models, critical approaches to teaching Japanese and content-based instruction. The review of these themes illuminates trends and emerging areas of interest in post-2010 L2 Japanese research inspired by current developments in applied linguistics and second language acquisition (SLA) research, as well as unique features of Japanese language and sociocultural contexts.

中文翻译：

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2010年代L2日语研究的趋势与发展

本文通过回顾 2010 年至 2019 年初期间以英语或日语发表的近 200 篇精选实证研究，更新了自 Mori 和 Mori (2011) 以来日语作为第二语言 (JSL) 研究的趋势和发展。第二语言（L2）日语发展的认知方面，侧重于词汇和汉字（即汉字转换成日语）的学习、句法的发展，以及与阅读和写作有关的问题。第二部分调查二语日语发展和使用中的社会文化问题，包括语用发展、多语言/跨语言视角和多语言青年。第三部分探讨情感变量（主要是学习者动机）在二语日语发展中的作用。最后一部分考虑了各种教学问题，包括基于语料库的研究和材料和资源的开发、教学设计和课堂研究、技术增强的语言学习和新的教学模式、日语教学的关键方法和基于内容的教学。对这些主题的回顾阐明了受应用语言学和第二语言习得 (SLA) 研究的当前发展以及日语和社会文化背景的独特特征启发的 2010 年后 L2 日语研究的趋势和新兴领域。日语教学和基于内容的教学的关键方法。对这些主题的回顾阐明了受应用语言学和第二语言习得 (SLA) 研究的当前发展以及日语和社会文化背景的独特特征启发的 2010 年后 L2 日语研究的趋势和新兴领域。日语教学和基于内容的教学的关键方法。对这些主题的回顾阐明了受应用语言学和第二语言习得 (SLA) 研究的当前发展以及日语和社会文化背景的独特特征启发的 2010 年后 L2 日语研究的趋势和新兴领域。