Mishima, Kohei (2016). "専属的な受託生産企業の発生と存続のメカニズム ―自動車産業におけるトヨタとトヨタ九州の委託生産関係―" [The mechanism of exclusive contractor firms' formation and existence: a contract manufacturing relationship between Toyota and Toyota Kyushu in the automotive industry]. Akamon Management Review (in Japanese). 15 (2). Global Business Research Center: 79–87. doi:10.14955/amr.150201. ISSN1347-4448.
"長崎街道について - 北九州市". www.city.kitakyushu.lg.jp (in Japanese). Retrieved September 13, 2025.
"公害克服への取り組み". 北九州市 (in Japanese). Retrieved June 19, 2022.
"環境首都を目指す取組". 北九州市 (in Japanese). Retrieved June 27, 2024.
"北九州フィルム・コミッション - 北九州市". www.city.kitakyushu.lg.jp (in Japanese). Retrieved February 17, 2021.
"人口の推移" (in Japanese). 北九州市. Retrieved February 18, 2021.
"高齢者人口・高齢化率"(PDF) (in Japanese). 北九州市. Retrieved February 18, 2021.
"五区から七区へ"(PDF). 市政だより (in Japanese). City of Kitakyushu. January 15, 1974. p. 4. Archived from the original(PDF) on September 7, 2023. Retrieved September 13, 2025.
姉妹・友好都市の紹介 [Introduction of sisters · friendship cities]. City of Kitakyushu (in Japanese). Archived from the original on September 6, 2019. Retrieved January 25, 2015.
"五区から七区へ"(PDF). 市政だより (in Japanese). City of Kitakyushu. January 15, 1974. p. 4. Archived from the original(PDF) on September 7, 2023. Retrieved September 13, 2025.
姉妹・友好都市の紹介 [Introduction of sisters · friendship cities]. City of Kitakyushu (in Japanese). Archived from the original on September 6, 2019. Retrieved January 25, 2015.
姉妹都市・交流都市 [Sister city, exchange city]. Minamikyushu city (in Japanese). Archived from the original on November 17, 2018. Retrieved February 23, 2015.
Mishima, Kohei (2016). "専属的な受託生産企業の発生と存続のメカニズム ―自動車産業におけるトヨタとトヨタ九州の委託生産関係―" [The mechanism of exclusive contractor firms' formation and existence: a contract manufacturing relationship between Toyota and Toyota Kyushu in the automotive industry]. Akamon Management Review (in Japanese). 15 (2). Global Business Research Center: 79–87. doi:10.14955/amr.150201. ISSN1347-4448.