Takahashi made his professional debut as a member of Nishonoseki stable in May 2022 along with fellow Nittaidai teammate Kayo [ja].
[5] In November he won his first six contests at the rank of sandanme, but missed out on the championship after losing his final match to Hitoshi [ja].
When the rankings for the September 2023 tournament were announced, it was confirmed that Takahashi's 5-win result in July was sufficient to promote him to jūryō, professional sumo's second-highest division.
[7] At his press conference to mark the jūryō promotion Takahashi said: "There has been difficult times for Fukushima, and now I want to give back to my hometown by rising up the banzuke."
On 22 December 2023 Nishonoseki stable announced on their X account (formerly Twitter) that Takahashi's shikona, or ring name, would change to Shirokuma for the January 2024 tournament.
The post also said that Takahashi was taught to wrestle like the late Hokuten'yū, whose nickname was the "white bear of the north sea," which influenced his decision to adopt the new name.
[11] Shirokuma took the jūryō division title at the July 2024 tournament for his third professional sumo championship, winning his Day 15 contest to avoid a three-way playoff.