Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) SAITO Nobuhiro and KOJIMA Daiki,Proficiency Level of Elementary Korean Particles by Native Japanese Speakers Learning Korean.,Journal of Korean Language Education,2188-6768,Japan Society of Korean Language Education,2018,13,0,77-90,https://cir.nii.ac.jp/crid/1390846609821210752,https://doi.org/10.24722/jaskle.13.0_77