[12][13] Otoguro then comfortably claimed the All–Japan Invitational crown with a flawless 6–0 win in the finals against 2016 Olympic Silver medalist Rei Higuchi, qualifying him for the JPN World Team Trials.

[14] At the WTT, he faced '2018 Asian Championship runner–up Daichi Takatani, whom he was able to flawlessly drive to a technical fall in under two minutes to claim the spot.

In the finals, he had another 25–point score match, now against 2018 Asian Games Gold medalist Bajrang Punia, whom he defeated 16–9 to claim the World Championship at 65 kilograms.

[18] He then wasted no time and became Japan's National Champion with wins over the accomplished Rei Higuchi and '18 Asian Games Silver medalist Daichi Takatani (by technical fall), being named the Outstanding Wrestler.

[22] At the tournament, limited preparation seemed to affect Otoguro, who lost by technical fall to Rei Higuchi in his first career loss as a senior.

[30] To make the finals, he dominated 2019 Junior Asian Continental runner–up Nodir Rakhimov to a technical fall and defeated Morteza Ghiasi.

After a competitive six minutes, Otoguro, again, exacted revenge and defeated the 2019 World Champion, by 3–2,[33] gaining entry to the final - opposite Azerbaijan's Haji Aliyev.