Yōko Kasahara (笠原 洋子, Kasahara Yōko, born 4 August 1945) is a female Japanese former volleyball player who competed in the 1968 Summer Olympics.

Olympic medal record
Women's Volleyball
Silver medal – second place 1968 Mexico City Team

In 1968 she was a squad member of the Japanese team which won the silver medal in the Olympic tournament.

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