Six volumes of "Nakayoshi"s 1963 "Princess Knight" were released between May 18, and July 27, 2001 in the United States in a bilingual (English/Japanese) edition by Kodansha International. A preview of the 1953 manga was released in the July 2007 issue of Viz Media's magazine, "Shojo Beat". At the 2011 San Diego Comic-Con International, Vertical announced that it had licensed the 1963 version for an English-language translation in North America. Vertical published it in two parts; the first on November 1, 2011, and the second on December 6, 2011. In the following year, Vertical licensed "The Twin Knights", which was released on July 30, 2013. Both series were rereleased by Vertical in ebook format; first, "The Twin Knights" on July 22, 2015, and then both "Princess Knight" volumes on August 12, 2015.