Laura Robson made it to the quarter-final of Yokohama where she lost to Harriet Dart 6-4 6-4 but then went on to win the doubles title.
Teaming up with Fanni Stollár to win the ITF 25K title, the pair faced no seeded opposition en route to the trophy.
Robson and her Hungarian partner were seeded second and faced Yuki Chiang & Julia Wachaczyk in their opener, getting off to a flying start against the American/German pairing and breaking in each of the sets to take the match, 6-3 6-3.
In the quarter-final they met Rika Fujiwara & Dalma Gálfi, who started the better and broke Robson & Stollár in the first set, to take the lead.
The seeded pair, however, broke the Japanese/Hungarian team to level the match and won the tiebreak decider to reach the semi-finals, 3-6 6-4 [10-5].
There Robson & Stollár were up against Haruka Kaji & Ayano Shimizu and the Japanese pairing tried hard to break the momentum of the second seeds, but the British/Hungarian team secured the break of serve needed in each set to book their place in the final 6-4 6-4.
The final saw them up against another Japanese pairing of Momoko Kobori & Chihiro Muramatsu.
The home favourites got off to the perfect start, staying with Robson & Stollár throughout the first set and earning a break right at the end to take the lead.
Robson & Stollár fought back well in the second set and, having worked out the Japanese pair’s game, they broke twice to level the match and force the match tiebreak in which the second seeds encountered little trouble to claim the title 5-7 6-2 [10-4].