Kōfu International Open

The Kōfu International Open is a tournament for professional female tennis players on outdoor hardcourts. The event is classified as a $40,000 ITF Women's Circuit. It had been held in Kōfu, Japan, since 2003. In 2011, it was a $50k women's event.

Year	Champion	Runner-up	Score
2025	Haruka Kaji	Himeno Sakatsume	7–6(7–2), 6–3
2024	Catherine Harrison	Lee Ya-hsuan	6–7(8–10), 6–1, 6–1
2023	Jang Su-jeong	Han Na-lae	2–6, 6–3, 6–2
2020–22	cancelled due to the COVID-19 pandemic
2019	Lee Hua-chen	Stephanie Wagner	6–7(4–7), 6–3, 6–4
2018	Luksika Kumkhum	Bianca Andreescu	6–3, 6–3
2017	Mayo Hibi	Han Na-lae	5–7, 6–3, 6–2
2016	Susanne Celik	Zhu Lin	7–6(7–3), 6–3
2015	Miki Miyamura	Aiko Yoshitomi	6–4, 6–2
2014	Chiaki Okadaue	Mana Ayukawa	3–6, 7–6(9–7), 6–2
2013	Yuuki Tanaka	Hiroko Kuwata	6–3, 6–1
2012	Hiroko Kuwata	Liu Fangzhou	6–4, 4–6, 7–6(9–7)
2011	Chang Kai-chen	Mandy Minella	6–4, 1–6, 6–4
2010	Sachie Ishizu	Akiko Yonemura	1–6, 6–1, 6–0
2009	Misaki Doi	Erika Sema	7–5, 6–2

Year	Champions	Runners-up	Score
2025	Momoko Kobori Ayano Shimizu	Akiko Omae Eri Shimizu	6–1, 6–4
2024	Erina Hayashi Saki Imamura	Rutuja Bhosale Ankita Raina	6–3, 7–5
2023	Han Na-lae Jang Su-jeong	Georgina García Pérez Eri Hozumi	6–0, 6–4
2020–22	cancelled due to the COVID-19 pandemic
2019	Chang Kai-chen Hsu Ching-wen	Emina Bektas Tara Moore	6–1, 6–3
2018	Gao Xinyu Luksika Kumkhum	Erina Hayashi Momoko Kobori	6–0, 2–6, [10–4]
2017	Han Na-lae Luksika Kumkhum	Erina Hayashi Robu Kajitani	6–3, 6–0
2016	Shuko Aoyama Erina Hayashi	Kanae Hisami Kotomi Takahata	7–5, 7–5
2015	Haruka Kaji Aiko Yoshitomi	Rika Fujiwara Akari Inoue	6–2, 6–3
2014	Nagi Hanatani Hikari Yamamoto	Riko Fujioka Hayaka Murase	3–6, 6–2, [10–7]
2013	Akari Inoue Hiroko Kuwata	Han Na-lae Yang Zi	3–6, 7–5, [10–7]
2012	Ayumi Oka Kotomi Takahata	Eri Hozumi Remi Tezuka	6–4, 5–7, [10–3]
2011	Chan Chin-wei Hsu Wen-hsin	Remi Tezuka Akiko Yonemura	6–3, 6–4
2010	Maki Arai Seiko Okamoto	Shiho Hisamatsu Maiko Inoue	6–4, 6–4
2009	Shuko Aoyama Akari Inoue	Maki Arai Miki Miyamura	7–5, 3–6, [10–8]

Year	Champion	Runner-up	Score
2020	cancelled due to the COVID-19 pandemic
2019	Jumpei Yamasaki	Sho Shimabukuro	7–6(7–5), 6–3
2018	Hong Seong-chan	Makoto Ochi	7–6(7–2), 6–1
2017	Takuto Niki	Shane Vinsant	6–4, 4–0 ret.
2016	Lee Duck-hee	Yuya Kibi	6–2, 6–3
2015	Lim Yong-kyu	Yasutaka Uchiyama	7–6(8–6), 6–3
2014	Takuto Niki	Yusuke Watanuki	6–4, 6–2
2013	Chang Yu	Nam Hyun-woo	6–2, 6–1
2012	Hiroki Moriya	Yasutaka Uchiyama	6–1, 6–4
2011	Not held
2010	Go Soeda	Yi Chu-huan	6–3, 6–4
2009	An Jae-sung	Yūchi Sugita	5–7, 6–4, 7–6(7–5)
2008	Yaoki Ishii	Daniel King-Turner	6–7(2–7), 6–3, 6–4
2007	Kwon Hyung-tae	An Jae-sung	7–5, 6–1
2006	Jun Woong-sun	Tetsuya Chaen	7–6(7–4), 7–5
2005	Satoshi Iwabuchi	Im Kyu-tae	6–2, 7–6(8–6)
2004	Michihisa Onoda	Kentaro Masuda	6–3, 7–5
2003	Takahiro Terachi	Kentaro Masuda	6–2, 6–2

Year	Champions	Runners-up	Score
2020	cancelled due to the COVID-19 pandemic
2019	Hiroyasu Ehara Sho Katayama	Blake Ellis Michael Look	6–2, 6–4
2018	Hiroyasu Ehara Sho Katayama	Seol Jae-min Song Min-kyu	7–5, 7–6(7–5)
2017	Katsuki Nagao Hiromasa Oku	Yuichi Ito Jumpei Yamasaki	6–4, 6–7(4–7), [10–3]
2016	Shintaro Imai Takuto Niki	Yuya Kibi Toshihide Matsui	6–1, 6–2
2015	Gao Xin Li Zhe	Takashi Saito Yusuke Watanuki	6–0, 6–7(4–7), [10–1]
2014	Takuto Niki Arata Onozawa	Toshihide Matsui Danai Udomchoke	6–4, 6–2
2013	Hiroki Kondo Kento Takeuchi	Chang Yu Kim Cheong-eui	6–1, 3–6, [10–7]
2012	Peng Hsien-yin Bumpei Sato	Chang Yu Gao Xin	6–3, 5–7, [10–6]
2011	Not held
2010	Tasuku Iwami Hiroki Kondo	Mikal Statham Maciek Sykut	6–2, 6–3
2009	Yang Tsung-hua Yi Chu-huan	Yuya Kibi Tomohiro Shinokawa	6–1, 6–0
2008	Gong Maoxin Li Zhe	G.D. Jones Daniel King-Turner	6–1, 7–5
2007	Akito Higa Tomohiro Shinokawa	An Jae-sung Daniel Yoo	3–6, 6–4, 6–4
2006	Jun Woong-sun Kim Sun-yong	Minh Le Hiroyasu Sato	6–2, 7–6(7–4)
2005	Im Kyu-tae Kwon Oh-hee	Mark Nielsen Hiroyasu Sato	4–6, 7–6(7–3), 6–3
2004	Scott Lipsky David Martin	Mark Nielsen Michihisa Onoda	2–6, 7–5, 7–6(8–6)
2003	Robert Cheyne Mark Nielsen	Katsushi Fukuda Michael Ryderstedt	4–6, 6–4, 6–3

• Official website
• ITF search Archived 2012-05-09 at the Wayback Machine