Japanese commentators have happily adopted the American jargon of  Strike one, ball two,   home run,  and  pinch hit.  
The use of American baseball terms is not allowed for commentators in Japan.  
mnli hypothesis: The use of American baseball terms is not allowed for commentators in Japan.   premise: Japanese commentators have happily adopted the American jargon of  Strike one, ball two,   home run,  and  pinch hit.  