[3][4] Miburo fought Eiki Kurata at Krush-EX 2020 vol.1, as a short notice replacement for Rikiya Suzuki, who was forced to withdraw due to a training injury.
[13] He would overcome Aoi Noda in the quarterfinals and Naoki Omura in the semifinals by decision, before losing to Toma Kuroda by knockout in the finals.
[14] Miburo was scheduled to face Toma Kuroda at K-1 World GP 2021 Japan on December 4, 2021.
They fought just five months prior, in the finals of the K-1 Japan Bantamweight Tournament, which Miburo lost by a first-round knockout.
[19] He successfully snapped his three-fight losing strea, as he won the fight by unanimous decision, with all three judges awarding him a 30–29 scorecard.
He was booked to face the three-sport World Kickboxing Network champion Samvel Babayan in the quarterfinals of the one-day tournament.
He advanced to the tournament semifinals, where he faced the 2021 K-1 Japan Grand Prix winner Toma Kuroda.