Refers to the sport of softball, similar to baseball but with a larger ball and underhand pitching.
週末に友達とソフトボールをした。
I played softball with friends on the weekend.
ソフトボール is played with a larger, softer ball and underhand pitching on a smaller field, while 野球 (baseball) uses a smaller ball, overhand pitching, and a larger field.
Used when counting softballs as balls; this is the most natural everyday counter.
Borrowed from English 'softball'.