"Kashiwa". Encyclopedia of Japan. Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on August 25, 2007. Retrieved 2012-07-17.
柏 [Kashiwa]. Kokushi Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC683276033. Archived from the original on August 25, 2007. Retrieved 2012-07-17.
"姉妹友好都市・ふるさと交流都市". city.kashiwa.lg.jp (in Japanese). Kashiwa. Retrieved 2020-04-10.
web.archive.org
"Kashiwa". Encyclopedia of Japan. Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on August 25, 2007. Retrieved 2012-07-17.
柏 [Kashiwa]. Kokushi Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC683276033. Archived from the original on August 25, 2007. Retrieved 2012-07-17.
worldcat.org
"Kashiwa". Encyclopedia of Japan. Tokyo: Shogakukan. 2012. OCLC56431036. Archived from the original on August 25, 2007. Retrieved 2012-07-17.
柏 [Kashiwa]. Kokushi Daijiten (in Japanese). Tokyo: Shogakukan. 2012. OCLC683276033. Archived from the original on August 25, 2007. Retrieved 2012-07-17.