[7] Kyoguchi was scheduled to fight the reigning IBF mini-flyweight champion Jose Argumedo in the latter's fourth title defense, on July 23, 2017.
[12] Kyoguchi established distance early on with the jab, and began accumulating damage on his opponent with a combination of body-head power shots.
[21][22] The two fighters were on an even playing field for the first half of the fight, before Kyoguchi took over in the seventh and began landing more frequent power shots to the head and body.
[26] During the pre-fight press conference, Kyoguchi stated his desire to fight his fellow countryman Kenshiro Teraji in a light flyweight title unification bout.
[28] Kyoguchi was scheduled to make the second defense of his WBA (Super) and The Ring light-flyweight titles against Tetsuya Hisada, on October 1, 2019.
[30] Kyoguchi remained in control for the duration of the bout, managing to score a knockdown in the ninth round, but being unable to finish Hisada.
[33] Kyoguchi was scheduled to defend his WBA (Super) and The Ring light-flyweight titles against Axel Aragon Vega, on March 13, 2021, on the undercard of the Juan Francisco Estrada and Román González card.
[36] Kyoguchi failed to make use of his 7-inch height and 6 inch reach advantage, spending the duration of the bout trading power shots in either the clinch or the pocket with his shorter opponent.
[38] However, on September 16, DAZN announced that Bermudez would make a voluntary title defense against the unbeaten Jesse “Bam” Rodriguez.
[43] On December 29, 2021, the WBA gave fight promoter Matchroom Boxing a ten-day period to deliver proof of firm plans that the title consolidation bout would take place.
[44] The WBA scheduled a purse bid for January 22, 2022, after Matchroom failed to provide sufficient proof that a bout would take place.
[45] On January 27, 2022, the WBA allowed Bermudez to make a voluntary title defense against Carlos Cañizales, as Kyoguchi withdrew from the scheduled purse bid due to an injury.
[46] The bout didn't take place however, as Cañizales opted to face Ganigan López for the vacant WBA Continental Americans flyweight title instead.
[50][51] Kyoguchi faced the two-time WBC light flyweight champion Kenshiro Teraji in a title unification match on November 1, 2022.