Jion Hosei

Jion Hosei (born 19 May 2007) is a Palauan swimmer. He represented Palau at the 2024 Summer Olympics in the men's 50 metre freestyle event. He also served as the flag-bearer for Palau in both the opening and closing ceremonies. He is the brother of Yuri Hosei, who also participated in the 2024 Summer Olympics. He placed sixth out of the eight swimmers in his heat, though he finished with a time not fast enough to progress to later rounds and placed 53rd overall. The eventual winner of the event was Cameron McEvoy of Australia with a time of 21.25 seconds. After he competed in his event, he expressed his gratitude to compete at the Games with his sister.

He participated in the 2024 Oceania Swimming Championships with the Palau men's relay team, which placed second in the 4 x 200 metre freestyle competition. At hte 2025 Pacific Mini Games, he recorded a 30.93 in the Mens 50 meter breaststroke. His time in the event decreased to 31.53 at the 2026 Oceania Swimming Championships. Hosei set a new national record in the 100 meter breaststroke.