In the 1960s, when Japan’s Social Welfare for the Elderly was said to have begun, Japan’s population aging rate, the share of the population aged 65 years and over, was 5.7%. In the 1970s, free medical care for senior citizens was implemented. However, by the 1980s, the population aging rate had reached 9.1%, and the number of long-term hospitalizations for supporting ADL or IADL that did not require medical treatment increased. By the 1990s, the aging rate had reached 12%. In 2000, the Japanese government introduced the national Long-Term Care Insurance System to shift care from institutional settings to home-based care, thereby alleviating the excessive burden of care on families, particularly those with parents and children (nuclear families). In other words, Long-Term Care Insurance in Japan can be described as a system that supports the care of senior citizens through societal efforts. In 2024, the total budget for long-term care insurance is approximately 14.2 trillion JPY, with 35,880,000 insured people aged 65 and older and 7,067,000 people (20%) requiring assistance or long-term care [1].