[10] Hiruta faced the three-time world title challenger Terumi Nuki on 12 April 2022, in what was the first eight-round bout of her career.
The title bout was scheduled for the undercard of "Queen's Crest 2022", which took place at the Korakuen Hall in Tokyo, Japan on 1 September 2022.
[16] On 2 November 2022, a press conference was held, attended by Hiruta and the Japanese bantamweight champion Kanako Taniyama.
At this press conference, it was revealed that the pair would face each other for the vacant WBO junior bantamweight championship.
The title bout was scheduled as the main event of Victoriva.7, which took place at the Korakuen Hall in Tokyo, Japan on 1 December 2022 and was broadcast by BOXING RAISE.
[20] Hiruta made her maiden WBO championship defense against Casey Morton on 13 June 2023, at the Korakuen Hall in Tokyo, Japan.