Hikari Okubo was born on August 11th, 1993 in Kodaira, Japan. He debuted in 2008, in the GP125 class of the All Japan Road Race Championship, and finished the campaign in 20th place. After improving his results in 2009 and claiming sixth position in the final standings, Okubo started the 2010 season with a victory at the Tsukuba circuit and closed it with another victory at Motegi, earning an additional two podiums that crowned him champion.

His success in the Japanese championship opened the doors for a wildcard debut in the 125cc World Championship, in which he finished 16th at the Japanese Grand Prix. Okubo would continue in the All Japan Road Race Championship and once again make a guest appearance in the 2011 edition of the Japanese Grand Prix that year, placing 17th.

The 2012 season brought about a change of focus, as Okubo dropped out of the Japanese championship to compete in the inaugural Asia Dream Cup. There, he used his consistency to take a victory and seven podiums to romp to the title.

Over the next two years, Okubo returned to Japan with his sights set on J-GP3 glory in the All Japan Road Race Championship. In 2014 he received another invitation to race in the Japanese Grand Prix in Moto3. In 2015 his AJRRC exploits would take him to the Supersport 600 class, in which he finished third overall.

Continuing in Supersport competition, he made his WSS debut in 2016, moving to international competition. Since then, the Japanese youngster has made promising progress with pace and consistency, with a best season coming in 2019 – when he managed to finish 5th in the standings after scoring points at every race.

In 2021, Okubo joined Avant Ajo MotoE for his debut year in the FIM MotoE World Cup. He enjoyed a positive campaign, making consistent steps forward and claiming good results in the final races of the season. The Japanese rider and the team now hope to carry on this form and make further improvements in the 2022 campaign.