The 2017 Japan Women's Open (also known as the 2017 Hashimoto Sogyo Japan Women's Open for sponsorship reasons) was a women's tennis tournament played on outdoor hard courts.

It was the ninth edition of the Japan Women's Open, and part of the WTA International tournaments of the 2017 WTA Tour.

It was held at the Ariake Coliseum in Tokyo, Japan, from September 11 through September 17, 2017.

1 Qualifiers prize money is also the Round of 32 prize money 2 Per team The following players received wildcards into the singles main draw: The following player received entry using a protected ranking: The following players received entry from the qualifying draw: The following pairs received wildcards into the doubles main draw: