Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) WADA Takashi,Changes in the production and distribution systems of kendo protectors and their influence on the material production areas,Research Journal of Budo,02879700,Japanese Academy of Budo,2018-03-31,50,3,135-147,https://cir.nii.ac.jp/crid/1390001288143290880,https://doi.org/10.11214/budo.50.135