Kōji Ishii (English Wikipedia)

"Koji Ishii (visual voices guide) - Behind The Voice Actors". behindthevoiceactors.com. Check mark indicates role has been confirmed using screenshots of closing credits and other reliable sources.{{cite web}}: CS1 maint: postscript (link)

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"[CHARACTER]望月双角:餓狼伝説総合公式サイト". garou15th.com (in Japanese). Retrieved November 4, 2021.
"[CHARACTER]山崎竜二:餓狼伝説総合公式サイト". garou15th.com (in Japanese). Retrieved November 4, 2021.
"[CHARACTER]牙刀:餓狼伝説総合公式サイト". garou15th.com (in Japanese). Retrieved November 4, 2021.

"声優さん出演リスト個別表示：石井康嗣(Kouji Ishii)" [Voice actor's appearance list individual display: Kouji Ishii]. Voice Artist Database (in Japanese). GamePlaza-HARUKA-. July 24, 2015. Archived from the original on March 5, 2016. Retrieved October 27, 2015.

"KOFキャラクター - THE KING OF FIGHTERS OFFICIAL WEB SITE". kofaniv.snk-corp.co.jp (in Japanese). Archived from the original on July 31, 2017. Retrieved December 4, 2021.
"KOFキャラクター - THE KING OF FIGHTERS OFFICIAL WEB SITE". kofaniv.snk-corp.co.jp (in Japanese). Archived from the original on April 4, 2017. Retrieved December 4, 2021.

Doi, Hitoshi (October 23, 2015). "Search results for "Ishii Kouji" in ALL database". Hitoshi Doi's Seiyuu Database. Retrieved October 23, 2015.

石井康嗣詳細ページ [Kouji Ishii resume]. Vi-Vo (in Japanese). Japan. Archived from the original on 31 March 2018. Retrieved 27 October 2015.

石井康嗣詳細ページ [Kouji Ishii resume]. Vi-Vo (in Japanese). Japan. Archived from the original on 31 March 2018. Retrieved 27 October 2015.
"声優さん出演リスト個別表示：石井康嗣(Kouji Ishii)" [Voice actor's appearance list individual display: Kouji Ishii]. Voice Artist Database (in Japanese). GamePlaza-HARUKA-. July 24, 2015. Archived from the original on March 5, 2016. Retrieved October 27, 2015.
"KOFキャラクター - THE KING OF FIGHTERS OFFICIAL WEB SITE". kofaniv.snk-corp.co.jp (in Japanese). Archived from the original on July 31, 2017. Retrieved December 4, 2021.
"KOFキャラクター - THE KING OF FIGHTERS OFFICIAL WEB SITE". kofaniv.snk-corp.co.jp (in Japanese). Archived from the original on April 4, 2017. Retrieved December 4, 2021.
"ウェイワード・パインズ出口のない街シーズン2 (2017)". 20th Century Fox JP. Archived from the original on June 5, 2020. Retrieved June 5, 2020.

"名画新吹き替えシリーズ NEW ERA MOVIES①". Cinema 1900 Novecento. Retrieved October 24, 2020.