On 15 January 2021, Kobayashi announce official signing first professional contract with Vanraure Hachinohe from Momoyama Gakuin University.
Although he participated in the opening match, he suffered an injury to the Anterior Cruciate Ligament of his left knee at Iwate Grulla Morioka in Matchweek 5 of J3 on 11 April 2021, which took 8 months to fully recover.
[3] On 5 January 2023, Kobayashi joined to JFL club, Kochi United for 2023 season.
[4] On 8 December 2024, Kobayashi was brought his club secure promotion to J3 League for the first time in their history from next season after defeat YSCC Yokohama 0-2 in second leg and win aggregate 1-3.
This biographical article related to a Japanese association football defender born in the 1990s is a stub.