In 1993, Nakane joined the Nezumikko Club, an all-girl idol group composed of Nakane, Natsu Itō, Kana Itō, Sato Higashi, Ami Yamazaki, Emiko Inoue, Juri Miyazawa, and Chiaki Nakajima.[4] The group was created to ride on the popularity of such groups as Onyanko Club. The group released two albums, both in 1993. In 1996, she began working as a gravure idol, gaining success due to having a larger bust for her age. Nakane began appearing in 1999 in drama series, as well as in variety, sports, educational, and other television programs.
She married Japanese baseball player Tsuyoshi Wada on 2005-12-10.[5][6][7][8] She gave birth to their first daughter on September 13, 2006.[9]
Nakane has been a spokesperson for MSN at the WPB Expo in Tokyo.[10] She helped launch a "morning wake-up call" service in 2002 by personally calling five customers selected at random as part of the service.[11] In 2004, she participated in a Yahoo! chat session to promote the release of her DVD box set Nakane Kasumi Memories Box "Merci!" in which over 6700 individuals participated by submitting over 3700 questions.[12] She is represented by the talent management firm Big Apple.