正統カリフ時代

せいとうカリフじだい

noun

•

Rashidun period (the period of the Rightly Guided Caliphs, 632-661 CE)

正	correct, justice, righteous, 10**40
統	overall, relationship, ruling, governing
時	time, hour
代	substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee