On 25 March 2016, Komatsu was registered as a Class 2 player.[2] On 9 September 2018, he was promoted to the first team.[3] On 10 December 2021, it was announced that Komatsu would return to Matsumoto for the 2022 season.[4] He made his league debut against Kamatamare Sanuki on 13 March 2022.[5] Komatsu scored his first league goal against YSCC Yokohama on 20 March 2022, scoring in the 65th minute.[6]
During the 2023 season, Komatsu was the J3 League top goalscorer, with 19 goals in 36 games. He was also part of the J3 League Best XI.[7]
Loan to Zweigen Kanazawa
On 10 January 2019, Komatsu was announced at Zweigen Kanazawa.[8] He made his league debut against Tochigi on 24 February 2019.[9] On his first start for the club against Tokyo Verdy on 9 March 2019, Komatsu scored his first league goal in the 8th minute.[10]
Loan to Renofa Yamaguchi
On 23 February 2020, Komatsu made his league debut against Kyoto Sanga.[11] He scored his first league goal against Mito HollyHock on 13 September 2020, scoring in the 66th minute.[12]
Blaublitz Akita
Komatsu was announced at Blaublitz Akita.[13] He made his league debut against Ehime on 25 February 2024.[14] Komatsu scored his first league goal against Montedio Yamagata on 18 May 2024, scoring in the 16th minute.[15]