One And Only

On his racecourse debut One And Only finished unplaced in a contest for previously unraced juveniles at Kokura Racecourse on 4 August and the finished second to Prokris in a maiden race over 1600 metres at Hanshin Racecourse a month later. Racing over the same course and distance on 29 September he recorded his first success as he won a maiden from seventeen opponents. He was then stepped up in class and finished second in the Listed Hagi Stakes at Kyoto Racecourse before running sixth to Isla Bonita in the Grade 3 Tokyo Sports Hai Nisai Stakes at Tokyo Racecourse on 16 November.[5] Christophe Lemaire took the ride when the colt started at odds of 12.7/1 for the Grade 3 Radio Nikkei Hai Nisai Stakes over 1200 metres at Hanshin on 21 December. After racing in mid-division for most of the way he produced a strong late run to take the lead in the last 50 metres and won by one and a quarter lengths from Azuma Shuttle.[6]

In the official Japanese rankings for 2013, One And Only was rated the fourth-best juvenile colt (level with Isla Bonita), behind Asia Express Shonan Achieve and Win Full Bloom.[7]

Norihiro Yokoyama, who rode One And Only in 2014

One And Only was ridden in all of his 2014 starts by Norihiro Yokoyama. He began his second season in the Yayoi Sho (a major trial race for the Satsuki Sho) over 2000 metres at Nakayama Racecourse on 9 March. Starting at odds of 8.8/1 he raced in mid-division before producing a strong late run on the outside but failed by a nose to catch the favourite To The World.[8] Six weeks later, over the same course and distance, the colt started 5.7/1 for the Satsuki Sho. He was last of the eighteen runners for most of the way before finishing strongly to come home fourth behind Isla Bonita, To The World and Win Full Bloom, beaten less than two lengths by the winner.

On 1 June One And Only was stepped up in distance for the 81st running of the Japanese Derby over 2400 metres at Tokyo and was made the 4.6/1 third favourite behind Isla Bonita and To The World. The other thirteen runners included Red Reveur (Hanshin Juvenile Fillies), Hagino Hybrid (Kyoto Shimbun Hai) Meiner Frost (Mainichi Hai), Shonan Lagoon (Aoba Sho) and Tagano Grandpa (Falcon Stakes). One An Only settled in fifth place before moving into contention early in the straight and got the better of a sustained struggle with Isla Bonita to win by three quarters of a length with a length and a half back to Meiner Frost in third place. After the race Yokoyama said "The trainer and his staff conditioned him perfectly for the Derby. He was unable to make a good start in the previous race but he broke well today and I was able to race him in striking position. He is still immature compared to his sire, but he was able to win the Derby and I hope that he will continue to develop steadily".[9]

After a break of almost four months One And Only returned to the track on 28 September for the Kobe Shimbun Hai (a trial race for the Kikuka Sho) over 2400 metres at Hanshin and started the odds-on favourite against fifteen opponents, the best fancied of whom were Satono Aladdin, Tosen Stardom (Kisaragi Sho), Win Full Bloom and Hagino Hybrid. After racing towards the rear he moved up on the outside on the final turn, took the lead in the straight and rallied after being overtaken by Sounds of Earth to regain the advantage and win by a head, with Toho Jackal a further head away in third.[10] One And Only started favourite for the Kikuka Sho at Kyoto four weeks later but after racing on the outside for most of the way he was unable to make any progress in the straight and came home ninth behind Toho Jackal, beaten seven and a half lengths by the winner. On his two remaining races of 2014 the colt was matched against top class older horses but made little impact as he ran seventh behind Epiphaneia in the Japan Cup on 30 November and thirteenth behind Gentildonna in the Arima Kinen on 28 December.

In the 2014 World's Best Racehorse Rankings, One And Only was given a rating of 119, making the 62nd best horse in the world.[11] In January 2015 One And Only finished second Isla Bonita in the poll to determine the JRA Award for Best Three-Year-Old Colt, receiving 109 votes to his rival's 170.[12]

One And Only began his third campaign with a trip to the United Arab Emirates to contest the Dubai Sheema Classic over 2400 metres at Meydan Racecourse. He produced one of his best performances as he took third place behind Dolniya and Flintshire with Designs On Rome, Just The Judge, Main Sequence and Harp Star running unplaced.[13] He failed to reproduce his best form in five other races that year, finishing unplaced in the Takarazuka Kinen, Kyoto Daishoten, Tenno Sho, Japan Cup and Arima Kinen.[5]

Kojiro Hashiguchi retired at the end of 2015 and One And Only was subsequently trained by Shinsuke Hashiguchi. The horse continued to race against top class opposition but never looked likely to win again, finishing unplaced in all six of his starts in 2016 and finishing no better than fifth in eight attempts in the following year.[5]