I have the book " The Pearl King" and she is mentioned there as the very best and strongest supporter of Mikimoto, always believing in him and dedicating her life to his obsession with the culturing of pearls...
She was believed to having an infected ovary, was operated on and got peritonitis 3 days after the operation. She was 32 years old and they had 5 children at the time of her death. However she lived long enough to see the first semi-round Akoyas.