Ryuzo Kitajima (北島 隆三, Kitajima Ryūzō, born 23 October 1985) is a Japanese Olympic eventing rider.

[1] He participated at the 2016 Summer Olympics in Rio de Janeiro where he withdrew during the individual competition.

After Cekatina was held at the vet inspection on show jumping day, Kitajima withdrew from the competition.

He won a silver medal in the team eventing and placed 6th individually.

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