Who added volleyball to the Olympic Games program in 1964?

What happened in the year 1964 in volleyball history?

The inaugural Women’s Volleyball Tournament in the Summer Olympic Games was held during Olympic Games of Tokyo, from October 11 to October 23, 1964. Japan won the gold medal, with the Soviet Union and Poland taking silver and bronze, respectively.

Round robin.

Team Japan
Sets Ratio 15.000
Points W 238
L 93
Ratio 2.559
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