She was from the sixth crop of foals sired by Deep Impact, who was the Japanese Horse of the Year in 2005 and 2006, winning races including the Tokyo Yushun, Tenno Sho, Arima Kinen and Japan Cup.

[4] Vivlos began her racing career by finishing a close second to Classic Lydia in an event for previously unraced juveniles over 1600 metres at Kyoto Racecourse on 24 October.

[5] On 10 September at Nakayama Vivlos started at odds of 4.8/1 for the Grade 3 Shion Stakes (a trial race for the Shuka Sho) and finished second of the eighteen runners, beaten two and a half lengths by the favourite Biche.

In the Grade 1 Shuka Sho over 2000 metres at Kyoto on 16 October Vivlos, ridden by Yuichi Fukunaga, started the 5.3/1 third choice in the betting behind Biche and Jeweler.

[8] On her 2017 debut Vivlos was matched against male opposition in the Grade 2 Nakayama Kinen over 1800 metres on 26 February in which she stayed on well from the rear of the field to finish fifth of the eleven runners, two lengths behind the six-year-old winner Neorealism.

The filly was then sent to the United Arab Emirates to contest the Dubai Turf over 1800 metres at Meydan Racecourse on 25 March in which she was ridden by the Hong Kong-based Brazilian jockey João Moreira and started at odds of 14/1.

The French colt Zarak started favourite ahead of the British-trained Ribchester while the other ten runners included Decorated Knight (Irish Champion Stakes), Deauville (Belmont Derby) and Mondialiste (Arlington Million).

The outsider Heshem gained the advantage from Ribchester inside the final furlong but Vivlos took the lead in the closing stages to win by half a length.

Four weeks later the filly was stepped up in distance and started 1.8/1 favourite for the Grade 1 Queen Elizabeth II Cup over 2200 metres at Kyoto in which she was partnered by Christophe Lemaire.

On this occasion she started at odds of 5.4/1 and finished eighth of the ten runners behind the four-year-old colt Win Bright, beaten three and a half lengths by the winner.

Almost three months later she was one of sixteen horses invited to contest the Takarazuka Kinen over 2200 metres at Hanshin Racecourse and kept on well in the closing stages to come home fourth behind Mikki Rocket.