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Ota Otaku Otaku ni koi wa muzukashii Otaku no Video Otariidae Otani Kikuzo Otagoa Otani Koki Ota Kosuke Ota HirokazuTài liệu tham khảo
WikiPedia: Ota Ryu http://blog.goo.ne.jp/kimion20002000/e/d461cf84a31... http://www.jrcl.net/ http://www.zenshin.org/english/nc_intro.htm https://www.marxist.com https://web.archive.org/web/20070314053443/http://... https://web.archive.org/web/20090429120808/http://...