"中城湾" [Nakagusuku Bay]. Dijitaru Daijisen (in Japanese). Tokyo: Shogakukan. 2013. OCLC56431036. Archived from the original on 25 August 2007. Retrieved 14 June 2013.
"中城湾" [Nakagusuku Bay]. Dijitaru Daijisen (in Japanese). Tokyo: Shogakukan. 2013. OCLC56431036. Archived from the original on 25 August 2007. Retrieved 14 June 2013.
"中城湾" [Nakagusuku Bay]. Dijitaru Daijisen (in Japanese). Tokyo: Shogakukan. 2013. OCLC56431036. Archived from the original on 25 August 2007. Retrieved 14 June 2013.