国际软式网球联合会[1]（International Soft Tennis Federation，ISFT）成立于1974年，是一个专门管辖国际软式网球事务的组织，总部设在韩国闻庆市。目前该组织有52个成员国，旗下主要比赛有世界杯和亚洲杯。
The International Soft Tennis Federation (ISTF) was established in 1973 and is the premier soft tennis governing body.[2]
In 1970 the Japan-US Soft Tennis Promotion Liaison Council was established. This is a liaison organization with American schools, and organised a friendly match between Japan and the United States for junior high school students.
In 1972, the Hawaii Soft Tennis Federation was established in Hawaii, United States. A state championship was held at the same time. Soft tennis was adopted as a regular PE event at a public high school in Hawaii.
Before and after the establishment of the Hawaii Soft Tennis Association, the Hong Kong Soft Tennis Association was established with the efforts of Taiwan (Republic of China Network Association). The Soft Tennis Association was also established in Venezuela and Brazil.
In June 1974 the first Japan-US High School Friendship Tournament was held.