In 2023, Aoyagi became the champion of his country in 70 kg. He defended this title, winning once more in 2024.
In 2019, Aoyagi won a bronze at the U17 World Championships held in Sofia. He went on to again win Bronze in Sofia in the 65kg class at the 2022 U20 World Championships.
Aoyagi won the bronze medal in 70 kg at the 2023 Asian Championships in Astana. He also won the silver medal in the 70kg weight class at the U23 World Championships in Tirana that same year.
In April 2024, he won the silver medal at the Asian Championships in Bishkek, losing to Iranian wrestler Amir Mohammad Yazdani in the final.
At the 2024 World Wrestling Championships in Tirana, Albania, he lost to Kazakh Nurkozha Kaipanov 5-3 in the men's freestyle 70 kg final match and won the silver medal. Aoyagi reached the final by defeating Turkish Yasin Yeşil 11-0 in the second round, Ukrainian Vasyl Shuptar 12-2 with technical superiority in the quarter-finals and Inalbek Sheriev, who competed for Russia, who participated as an Individual Independent, 6-1 in the semi-finals.[2][3]
Also at Tirana that year, he won a bronze medal at 70kg at the U23 World Championships.
Rounding out 2024, he won Gold at the Grand Prix event in Sangju, and bronze in the Yasar Dogu Tournament in Antalya - both in the 70kg weight class.
In 2025 Grand Prix events, Aoyagi won gold in both Tirana and Budapest in the 70kg weight class. He also achieved a bronze place finish at the 2025 Asian Championships in Amman in the same class.
Japan
Japan
