Yoshihisa Hirano has thrown 1,721 pitches that have been tracked by the PITCHf/x system between 2017 and 2019, including pitches thrown in the MLB Regular Season, The World Baseball Classic and Spring Training. In 2019, he has relied primarily on his Splitter (84mph) and Fourseam Fastball (91mph). He also rarely throws a Curve (75mph).
Basic description of 2019 pitches compared to other RHP:
His splitter is a real worm killer that generates an extreme number of groundballs compared to other pitchers' splitters and has some natural sink to it. His fourseam fastball results in somewhat more flyballs compared to other pitchers' fourseamers and has slightly below average velo. His curve (take this with a grain of salt because he's only thrown 6 of them in 2019) is basically never swung at and missed compared to other pitchers' curves, results in more flyballs compared to other pitchers' curves, has primarily 12-6 movement and has slightly below average velo.