Born in May 1908, Itooka experienced significant historical events, including both World Wars and major technological advancements. She was recognized by Guinness World Records as the oldest person in September 2024 and was honored with an official certificate on Respect for the Aged Day. An active individual in her youth, she enjoyed sports like volleyball and achieved the feat of climbing Mount Ontake twice.

Having married at the age of 20, she had a family of four children and managed her husband's textile factory during World War II. After her husband's passing in 1979, Itooka lived alone in Nara. She is survived by one son, one daughter, and five grandchildren. A funeral service was held in her honor among family and friends. Following her death, Brazilian nun Inah Canabarro Lucas, born just 16 days after Itooka, is now recognized as the world's oldest living person. With over 95,000 centenarians in Japan, the country has a significant aging population, with almost one-third of its 124 million citizens aged 65 or older.