according to another view , the calculation of michiyo naka is wrong and one period is correctly 1320 years as cited in ' kakumeikanmon ,' so that the first year of back calculation corresponds to the kanototori year of 661 . 異説では、那珂通世の計算には誤認があり、一蔀は「革命勘文」の引用のとおり1320年が正しく従って逆算起点は斉明天皇7年（661年）の辛酉の年になるともいう。
according to the " kojiki ," the year of his demise which is ' the seventh month in the year of teach or hinoto no ushi (according to the chinese sexagenary cycle )' corresponds to the year 437 ce , and as a result of back calculation his year of birth corresponds to the year 378 ce , which was nine years after the birth of his elder brother , emperor richu . 『古事記』に従えば、崩御した「丁丑年七月」は西暦437年に相当し、生年は逆算して、兄履中天皇より9歳年下の西暦378年に相当するが、定かではない。
further , an article in " kojiki " (literally , the records of ancient matters ) shows that emperor richu passed away at the age of 64 ' on the third day of the new year ' s in the year of jinshin or mizunoe-saru (according to the chinese sexagenary cycle )' (in 432 ), and if this is correct , he should have reigned from 427 to 432 , and as a result of back calculation the year of his birth should be , though uncertain , 369 . また古事記には「壬申年正月三日」に64歳で崩ずとの記事が見え、これが正しければ、在位期間が427年から432年となり、生年が逆算して369年という事になるが、定かではない。
