Play word 正倉 正倉 しょうそう public storehouse used to store grain or valuables collected for taxation (ritsuryō system)
Play word 正丁 正丁 しょうてい man in good health between 21 and 60 years of age to whom applied various corvee and taxes (under the ritsuryō system)
Play word 正統カリフ時代 正統カリフ時代 せいとうカリフじだい Rashidun period (period of the Rightly Guided Caliphs; 632-661 CE)