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第二言語としての日本語の習得研究 = acquisition of Japanese as a second language. Daini gengo toshite no Nihongo no shūtoku kenkyū = acquisition of Japanese as a second language.
開篇 = Kai pian. Kai hen = Kai pian.
國語と國文學. Kokugo to kokubungaku.
日本語の研究. Nihongo no kenkyū.
日本漢文學硏究, Nihon Kanbungaku kenkyū,