Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) "ISHIGURO, Kei",How learners learn Japanese: The method for collecting data on Japanese language usage in the post-corona era,東アジア日本学研究,,東アジア日本学研究学会,2023-03-20,,9,5-20,https://cir.nii.ac.jp/crid/1050860078877998336,