Shimano was continuously ranked as a top ten –60 kg (132 lbs) kickboxer by Combat Press between May 2019 and June 2021.
[1][2] Shimano enjoyed one of the best runs of his career in 2014, when he went on a five fight winning streak, including a first round TKO of Leona Pettas.
[6] He would lose two of his next three fights, before successfully defending the MA Japan title, with a second round KO of Ryoji Washio.
[10] During the MA Japan Kick - Soeno Dojo 50th Anniversary event, Shimano was scheduled to fight Tapejyun Saichan for the WMAF World Super Featherweight title.
[18] Shimano was scheduled to face Hirotaka Urabe in a 61 kg catchweight bout at K-1 World GP 2022 Japan on February 27, 2022.
[20] Shimano made his second WMAF World Super Featherweight title defense against Yugo Flyskygym at MA Japan Kick - Tekken 14 on August 28, 2022.