The Solomon Islands delegation consisted of three athletes: long-distance runner Sharon Firisua, swimmer Edgar Iro, and weightlifter Mary Kini Lifu.

[4] Edgar Iro was the only person in the Solomon Islands delegation to not take part in the IOC chartered flight.

Officials present were National Olympic Committee of Solomon Islands (NOCSI) president Martin Rara, NOCSI delegation general secretary Melinda Avosa, technical director Apollos Saeg, who was also called to be the weightlifting head coach,[6] and chef de mission and Japanese government volunteer Naoyuki Fujiyama.

[7] Fujiyama's role in the delegation was controversial after multiple calls from Solomon Islands national sports federations for him to step down from his position due to alleged corruption and fraud, and the fact that he had breached the constitution of the NOCSI that "restricted non-citizens from participating in the administration of sports matters in Solomon Islands", as he was only a resident of the nation and not a citizen.

[6] Weightlifter and two-time Olympian Jenly Tegu Wini was also expected to compete for the nation in the women's 59 kg category,[9] but did not qualify after not tallying enough points for the rankings.

[11] The Solomon Islands delegation marched 101st out of 206 countries in the 2020 Summer Olympics Parade of Nations within the opening ceremony, due to the host's use of the local kana alphabetical system.

[19] She competed in her event on 7 August 2021 at 6:00 p.m.,[20] in Sapporo, Hokkaido, instead of Tokyo, after a decision made and approved by the International Olympic Committee.

Mary Kini Lifu topped the list of weightlifters from Oceania in the women's 55 kg category based on the IWF Absolute Continental Rankings.

[30] Weightlifter and two-time Olympian Jenly Tegu Wini was also expected to compete for the nation in the women's 59 kg category,[9] but did not qualify after not tallying enough points for the rankings.

[31] Before the Games, Lifu was granted an IOC scholarship, which allowed her to train at the Oceania Weightlifting Institute in New Caledonia.

The nation has one of the worst cases of gender inequality and domestic violence in the world, with 64% of women aged 15–49 having reported physical and/or sexual abuse by a partner.

[35][36] Lifu stated "the province I came [sic] from is male dominated, women are sometimes not allowed to take up sports because of cultural beliefs."