Rion Ichihara

As a youth player, Ichihara joined the youth academy of Japanese side RB Omiya Ardija and was promoted to the club's senior team in 2023, where he made seventy-eight league appearances and scored five goals and helped them achieve promotion from the third tier to the second tier. Following his stint there, he signed for Dutch side AZ Alkmaar in 2026.

Ichihara is a Japan youth international. During January 2026, he played for the Japan national under-23 football team at the 2026 AFC U-23 Asian Cup.

Ichihara plays as a defender. Japanese magazine Soccer Hihyo wrote in 2026 that he "is a center back who combines height of 187cm with strength and skill with his feet, and leads the defensive line with exceptional leadership".

Ichihara was born in Saitama, Japan.