大たい化か前ぜん代だいたいかぜんだいMeanings1nounpre-Taika periodhistorical termHistorical term referring to the period in the 6th and 7th centuries before the Taika Reform (645 CE). Used in academic or historical contexts.大たい化か前ぜん代だいの政せい治じ体たい制せいについて