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"夷隅郡" [Isumi District]. Nihon Rekishi Chimei Taikei (in Japanese). Tokyo: Shogakukan. 2012. OCLC173191044. dlc 2009238904. Archived from the original on 2007-08-25. Retrieved 2012-09-10.
"夷隅郡" [Isumi District]. Kokushi Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC683276033. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
"夷隅" [Isumi]. Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012. OCLC153301537. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
"夷隅" [Isumi]. Nihon Kokugo Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
web.archive.org
"夷隅郡" [Isumi District]. Nihon Rekishi Chimei Taikei (in Japanese). Tokyo: Shogakukan. 2012. OCLC173191044. dlc 2009238904. Archived from the original on 2007-08-25. Retrieved 2012-09-10.
"夷隅郡" [Isumi District]. Kokushi Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC683276033. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
"夷隅" [Isumi]. Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012. OCLC153301537. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
"夷隅" [Isumi]. Nihon Kokugo Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
worldcat.org
"夷隅郡" [Isumi District]. Nihon Rekishi Chimei Taikei (in Japanese). Tokyo: Shogakukan. 2012. OCLC173191044. dlc 2009238904. Archived from the original on 2007-08-25. Retrieved 2012-09-10.
"夷隅郡" [Isumi District]. Kokushi Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC683276033. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
"夷隅" [Isumi]. Nihon Daihyakka Zensho (Nipponika) (in Japanese). Tokyo: Shogakukan. 2012. OCLC153301537. Archived from the original on 2007-08-25. Retrieved 2012-09-28.
"夷隅" [Isumi]. Nihon Kokugo Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on 2007-08-25. Retrieved 2012-09-28.