Fayose confirmed the death of his elder sister about 2 pm on Monday.
He said Moji died after a brief illness.
Fayose described Moji as a God-fearing individual who lived an exemplary life.
He stated: “On behalf of my family, I announce the death of my immediate elder sister, Mrs. Moji Ladeji. She died today, after a brief illness.
“We are pained by your departure, but consoled by the God-fearing and exemplary life that you lived.
“May the soul of Sister Moji rest in peace.”