Vocabulary What does 清酒 (せいしゅ, seishu) mean? 清酒 (せいしゅ, seishu) means refined sake. Quick factsReadingせいしゅRomajiseishuPart of speechnoun 清酒せいしゅseishurefined sake1noun refined sakeKanji in this word清pure, clean酒alcohol, liquor