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Born in Yamanashi Prefecture, Nakamaru studied abroad at Columbia University. While beginning to write articles and books on international relations, she hosted a number of nationally broadcast television interview series, including Sekai no Shuyaku (世界の主役?) in 1972. The magazine Newsweek nicknamed her "the Edward R. Murrow of Japan" in a 1974 profile that introduced her alongside Makiko Tanaka as one of a "handful of Japanese women who have bucked their country's patriarchal system". The profile itself was news in Japan. During her career, she has interviewed such world figures as Edward M. Kennedy, the Shah of Iran Mohammad Reza Pahlavi, and Idi Amin.
Nakamaru was married to the film and television actor Tadao Nakamaru, who died on 23 April 2009.
- Junichiro Kida, ed. (1992–1993). "Nakamaru Kaoru". 新現代日本執筆者大事典 [Contemporary writers of Japan] (in Japanese). Tokyo: Nichigai Associates. p. v. 3: 563. ISBN 4816911618.
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- "Four Women of Japan". Newsweek: 39. 28 January 1974.
- "米週刊誌に選ばれた 「日本の代表的女性」" ["Women who represent Japan" selected by US weekly magazine]. Shūkan Yomiuri: 22. 9 February 1974.
- "米一流誌が評価したトップレディの弱点" [The weak points of the top women lauded by a leading US paper]. Shūkan Taishū: 16. 14 February 1974.
- "世界の指導者と心で語り合う" [Talking from the heart with world leaders]. Shūkan Yomiuri: 70. 24 September 1977.
- "中丸薫さん、世界のトップと出会い" [Kaoru Nakamaru - meeting with world leaders]. Mainichi Shinbun (evening edition). 10 August 1987.
- "Profile of Kaoru Nakamaru". Kaoru Nakamaru official website. The International Affairs Institute for World Peace. 2008. Retrieved 8 May 2014.
- "韓国の新聞に「偽者」と報じられた「明治天皇の孫」中丸薫" [Kaoru Nakamaru "granddaughter of Emperor Meiji" reported as fake in Korean newspaper]. Shūkan Shinchō 49 (33): 46–47. 2 September 2004.
- 中丸忠雄氏死去 俳優 [Tadao Nakamaru dies]. 47 News (in Japanese). Japan: Press Net Japan Co., Ltd. 28 April 2009. Retrieved 8 May 2014.