Natsumi Hamamura

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 Japan Women's Open, in the doubles event partnering Miki Miyamura.

ITF finals Singles (3–3) Legend$50,000 tournaments$25,000 tournaments$10,000 tournamentsFinals by surfaceHard (1–1)Clay (2–0)Carpet (0–2) OutcomeNo.DateLocationSurfaceOpponentScoreWinner 1. 7 November 2004 Sutama, Japan Clay Florence Haring 3–6, 6–3, 7–5Runner-up 1. 5 February 2006 Taupō, New Zealand Hard Leanne Baker 1–6, 2–6Runner-up 2. 21 May 2007 Nagano, Japan Carpet Rika Fujiwara 5–7, 2–6Runner-up 3. 3 June 2007 Gunma, Japan Carpet Kumiko Iijima 6–3, 3–6, 6–7(3–7)Winner 2. 3 May 2010 Bundaberg, Australia Hard Sally Peers 6–0, 6–4Winner 3. 23 May 2010 Karuizawa, Japan Clay Xu Yifan 6–1, 6–2

Doubles (9–9) Legend$50,000 tournaments$25,000 tournaments$10,000 tournamentsFinals by surfaceHard (4–4)Clay (0–1)Carpet (5–4) OutcomeNo.DateTournamentSurfacePartnerOpponentsScoreWinner 1. 10 September 2006 Kyoto, Japan Carpet Ayaka Maekawa Maki Arai Yukiko Yabe 6–4, 6–2Runner-up 1. 23 September 2006 Ibaraki, Japan Hard Ayaka Maekawa Kumiko Iijima Junri Namigata 7–6(7–4), 3–6, 2–6Runner-up 2. 16 February 2007 Melbourne, Australia Clay Ayumi Morita Hwang I-hsuan Lee Ye-ra 2–6, 1–6Winner 2. 6 May 2007 Chengdu, China Hard Song Shanshan Chen Yanchong Liu Wanting 7–5, 4–6, 6–2Winner 3. 27 May 2007 Nagano, Japan Carpet Ayaka Maekawa Mari Tanaka Akiko Yonemura 7–6(7–2), 6–3Runner-up 3. 19 June 2007 Noto, Japan Carpet Mari Tanaka Anne Yelsey Sophie Ferguson 6–7(8–10), 1–6Runner-up 4. 10 July 2007 Miyazaki, Japan Carpet Ayaka Maekawa Zhang Shuai Zhao Yijing 4–6, 4–6Runner-up 5. 22 September 2007 Tsukuba, Japan Hard Ayaka Maekawa Ayumi Oka Tomoko Sugano 2–6, 3–6Runner-up 6. 10 March 2008 Kalgoorlie, Australia Hard Remi Tezuka Li Ting Zhou Yimiao 1–6, 6–4, [8–10]Winner 4. 23 June 2008 Qianshan, China Hard Remi Tezuka Yuka Kuroda Tomoko Sugano 6–4, 6–0Winner 5. 19 October 2008 Makinohara, Japan Carpet Junri Namigata Chae Kyung-yee Han Xinyun 7–5, 7–6(7–4)Winner 6. 2 August 2009 Obihiro, Japan Carpet Ayumi Oka Rika Fujiwara Kurumi Nara 3–6, 6–1, [10–5]Winner 7. 4 February 2011 Burnie International, Australia Hard Erika Takao Olivia Rogowska Sally Peers 6–2, 3–6, [10–7]Runner-up 7. 22 May 2011 Karuizawa, Japan Carpet (i) Ayumi Oka Rika Fujiwara Shuko Aoyama 4–6, 4–6Winner 8. 24 May 2011 Niigata, Japan Hard Erika Sema Akari Inoue Ayumi Oka 6–1, 6–2Runner-up 8. 19 June 2011 Balikpapan, Indonesia Hard Yurika Sema Kanae Hisami Varatchaya Wongteanchai 3–6, 2–6Runner-up 9. 11 September 2011 Noto, Japan Carpet Ayumi Oka Kanae Hisami Varatchaya Wongteanchai 6–1, 6–7(4–7), [12–14]Winner 9. 30 October 2011 Hamanako, Japan Carpet Ayumi Oka Huỳnh Phương Đài Trang Varatchaya Wongteanchai 6–3, 6–3