[4] The following year, at the 2019 FINA World Junior Swimming Championships held in August at Danube Arena in Budapest, Hungary, he won the silver medal in the 200 metre butterfly with a final mark of 1:55.31, sharing the podium with gold medalist Luca Urlando of the United States and bronze medalist Federico Burdisso of Italy.

[8][9] Three days earlier in the Championships, he finished in a time of 4:12.20 in the final of the 400 metre individual medley to place seventh.

[2][11][12] At the Japan Swim 2023, held in April in Tokyo, Honda won the silver medal in the 400 metre individual medley with a personal best time of 4:10.37.

[14] In the evening, he won the gold medal with a 2023 World Aquatics Championships and 2022 Asian Games qualifying and personal best time of 1:53.34.

[15][16] The fifth morning, he finished in a time of 52.02 seconds in the preliminaries of the 100 metre butterfly, ranking fourth overall and qualifying for the final.