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和英語林集成第三版 [Digital 'Japanese English Forest Collection']. Meiji Gakuin University Library (in Japanese). Meiji Gakuin University. March 2010 [2006]. Archived from the original on October 22, 2016. Retrieved August 10, 2017.
Consulate-General of Japan in San Francisco. ヘボン式ローマ字綴方表 [Table of Spelling in Hepburn Romanization] (PDF) (in Japanese). Archived from the original(PDF) on May 13, 2012. Retrieved December 13, 2011.
Hadamitzky, Wolfgang; Spahn, Mark (October 2005). "Romanization systems". Wolfgang Hadamitzky: Japan-related Textbooks, Dictionaries, and Reference Works. Archived from the original on January 24, 2017. Retrieved August 10, 2017.
道路標識のローマ字(ヘボン式) の綴り方 [How to spell Roman letters (Hepburn style) of road signs]. Kictec (in Japanese). June 14, 2012. Archived from the original on April 20, 2016. Retrieved August 10, 2017.
Hadamitzky, Wolfgang; Spahn, Mark (October 2005). "Romanization systems". Wolfgang Hadamitzky: Japan-related Textbooks, Dictionaries, and Reference Works. Archived from the original on January 24, 2017. Retrieved August 10, 2017.
和英語林集成第三版 [Digital 'Japanese English Forest Collection']. Meiji Gakuin University Library (in Japanese). Meiji Gakuin University. March 2010 [2006]. Archived from the original on October 22, 2016. Retrieved August 10, 2017.
"鉄道掲示基準規程". Homepage1.nifty.com. Archived from the original on March 1, 2012. Retrieved July 13, 2012.
道路標識のローマ字(ヘボン式) の綴り方 [How to spell Roman letters (Hepburn style) of road signs]. Kictec (in Japanese). June 14, 2012. Archived from the original on April 20, 2016. Retrieved August 10, 2017.
"ヘボン式ローマ字綴方表". Ministry of Foreign Affairs of Japan. Archived from the original on August 10, 2022. Retrieved May 16, 2022.
Consulate-General of Japan in San Francisco. ヘボン式ローマ字綴方表 [Table of Spelling in Hepburn Romanization] (PDF) (in Japanese). Archived from the original(PDF) on May 13, 2012. Retrieved December 13, 2011.
Cabinet of Japan (November 16, 1946). 昭和21年内閣告示第33号 「現代かなづかい」 [Japanese Cabinet Order No.33 in 1946 - Modern kana usage] (in Japanese). Archived from the original on October 6, 2001. Retrieved May 25, 2011.