However, when calculating her birth year based on the description in the article for May 1, 1190, in "Azumakagami" that she was 46 years old when she died, makes her born in 1145, making her older than Yoritomo who was born in 1147.
しかしながら、『吾妻鏡』建久元年（1190年）4月20日条に書かれた享年46から逆算すると、1145年生まれとなり、1147年生まれの頼朝の姉になる。