Natsumi Hamamura (浜村 夏美, Hanamura Natsumi, born 29 June 1984) is a Japanese former professional tennis player. Hamamura has a career-high singles ranking of world No. 203, achieved on 25 February 2008. On 20 August 2007, she peaked at No. 194 in the WTA doubles rankings. In her career, she won three singles titles and nine doubles titles on the ITF Women's Circuit. Hamamura made her WTA Tour main-draw debut at the 2010 HP Open, in the doubles event partnering Miki Miyamura.