Claim: The first WTA singles title Heather Watson won was in Japan.
Evidence: On 14 October 2012 , Watson won her first WTA singles title with a win over Chang Kai-chen of Taiwan in the final of the Japan Open , becoming the first British female to win a WTA singles title since Sara Gomer in 1988.
The Japan Open -LRB- currently sponsored by Rakuten -RRB- is a tennis tournament held in Ariake Tennis Forest Park with its center court Ariake Coliseum , located in Koto , Tokyo , Japan.