Tokyo (AP) — The Japanese imperial family mourns the loss of Princess Yuriko, who passed away at the age of 101 after a recent health decline, according to the Imperial Household Agency. While the cause of death was not officially declared, reports indicate pneumonia played a significant role in her passing.

Born in 1923 to an aristocratic family, Princess Yuriko’s life was interwoven with both the challenges of war and the duties of the imperial family. She married Prince Mikasa, the younger brother of Emperor Hirohito and uncle to current Emperor Naruhito, shortly before the outbreak of World War II. Their lives were forever altered when, during the war, they sought refuge in a shelter after their home was destroyed by US air raids in 1945, an experience Yuriko recounted with remarkable clarity.

Throughout her lifetime, Princess Yuriko raised five children and was actively involved in her husband’s scholarly pursuits in ancient Near Eastern history. Alongside these responsibilities, she dedicated her time to various philanthropic efforts, contributing significantly to societal causes.

With her passing, Japan’s imperial family has dwindled to just 16 members, including only four males, raising concerns about its future. The longstanding Imperial House Law of 1947 restricts the throne to male successors and requires female members who marry outside the royal family to forfeit their titles—an issue currently under scrutiny as Japan faces a royal succession crisis.

The youngest male heir, Prince Hisahito, the nephew of Emperor Naruhito, remains the last name linked to the current line of succession, sparking intense discussions about how to ensure the continuity of the imperial lineage in a system that does not permit female ascension.

Despite her advanced age, Princess Yuriko maintained a vibrant life, enjoying morning exercises alongside a fitness television program, keeping up with various newspapers and magazines, and reveling in baseball games. She often spent tranquil moments in the palace garden, soaking in the sun, and was regularly wheeled around in her wheelchair during her later years.

In March, the princess faced health challenges, including a stroke and pneumonia, which required several hospitalizations and ultimately led to her declining condition in the last week of her life.

As Japan bids farewell to this remarkable woman, her legacy of resilience, dedication to family, and commitment to the imperial duties will be remembered as an indelible part of the nation's history.