Princess Yuriko, who had been experiencing deteriorating health since last week, died on Friday due to natural causes. At 101 years old, she had been the oldest member of the imperial family.

Princess Yuriko, who had been hospitalized since early March due to a stroke and pneumonia, had been suffering from a deterioration in the functions of her heart, kidneys and other organs.

Born in 1923 to an elite family, she joined the imperial family at age 18 when she married Prince Mikasa, the younger brother of former Emperor Hirohito — posthumously known as Emperor Showa — and is the great-aunt of current Emperor Naruhito.