Vocabulary What does 速球 (そっきゅう, sokkyuu) mean? 速球 (そっきゅう, sokkyuu) means fastball. Quick factsReadingそっきゅうRomajisokkyuuPart of speechnoun 速球そっきゅうsokkyuufastball1noun fastballKanji in this word速fast, speed球ball; sphere