. . "堅山" . "タダオ" . . "片山忠雄" . "タダオ カタヤマ" . . . "堅山忠男" . "Tadao Katayama"@en . "片山忠雄" . "Tadao"@en . . "堅山忠男" . "Tadao Katayama" . "忠男" . "カタヤマ" . "忠男 堅山"@ja-JP . "http://www.wikidata.org/entity/Q6581097" . "堅山忠男" . "1948" . "Katayama"@en .