1. 1
    Nihongo jānaru = The Nihongo journal.
    日本語ジャーナル = The Nihongo journal.
    Journal
  2. 2
    Nihongo kyōiku ronshū.
    日本語敎育論集.
    Published 1991
    Journal
  3. 3
    Gengo.
    言語.
    Published 1972
    Journal
  4. 4
    Daini gengo toshite no Nihongo no shūtoku kenkyū = acquisition of Japanese as a second language.
    第二言語としての日本語の習得研究 = acquisition of Japanese as a second language.
    Published 1997
    Journal