[2] He was from the fourth crop of foals sired by Harbinger, a British horse who was rated the best racehorse in the world in 2010 when he won the King George VI and Queen Elizabeth Stakes by eleven lengths.

Since retiring to stud in Japan his other foals have included Deirdre (Shuka Sho), Mozu Katchan (Queen Elizabeth II Cup) and Persian Knight (Mile Championship).

The race resulted in a blanket finish with Blast Onepiece (who recovered from interference in the straight) coming home fifth behind Wagnerian, Epoca d'Oro, Cosmic Force and Etario, beaten less than a length by the winner.

[10] Blast Onepiece was one of sixteen horses invited to contest the 2500 metres Arima Kinen at Nakayama Racecourse on 23 December and was made the 7.9/1 third choice in the betting behind Rey de Oro and Kiseki.

After racing wide for most of the way, Blast Onepiece produced a sustained run in the straight, overtook the front-running Kiseki 100 metres from the finish and held off the late challenge of Rey de Oro to win by a neck.

Ridden by Yuga Kawada he was restrained in the early stages before staying on strongly in the straight and despite briefly struggling to obtain a clear passage he ran down Sungrazer in the final strides to win by a neck.

Starting the 2/1 favourite in a twelve-runner field he settled behind the leaders as Stiffelio set the pace before moving into contention on the final turn, overtaking Stay Foolish in the last 200 metres and winning by one and a quarter lengths.

On 5 April, in his second attempt to win the Osaka Hai the horse started third choice in the betting but after moving into a promising position approaching the last turn he was unable to make any progress in the straight and came home seventh, beaten just over three lengths by the winner Lucky Lilac.

[17] After the summer break Blast Onepiece returned to the track for the autumn edition of the Tenno Sho at Tokyo on 1 November and came home eleventh behind Almond Eye, beaten more than ten lengths by the winner.