KADOKAWA Corporation, headquartered in Chiyoda-ku, Tokyo and led by Director, Representative Executive Officer, President and CEO Takeshi Natsuno, released on Thursday, May 14, 2026 the first book by the day-service facility Rehashine Miyakonojo, which has more than 600,000 followers across social media: Idea Japan No. 1! Everyone’s Complete Recreation Book 100: Fun and Exciting Activities for Seniors! The book presents 100 recreation ideas that genuinely energized care-site participants, shared by Rehashine Miyakonojo, a facility that carries out more than 300 recreational activities each year and enjoys strong support on social media. It captures in one volume the facility’s challenge to transform care settings from Miyakonojo City in Miyazaki Prefecture. The book reached No. 1 on Amazon’s bestseller rankings in the Books categories of nursing care, care welfare studies, quizzes, puzzles, and games. The nursing care category ranking was recorded on April 13, 2026, while the care welfare studies and quizzes, puzzles, and games categories were recorded on March 23, 2026. In a super-aged society, recreation at care facilities is essential for improving users’ quality of life. However, staff are busy with daily duties and have limited time to prepare activities. Users also voice concerns such as feeling as if they are being treated like children, or becoming bored when the content is the same every day. Rehashine Miyakonojo, a day-service facility in Miyakonojo City, Miyazaki Prefecture, practices more than 300 new recreation activities annually and shares successful examples on Instagram and other social media platforms. Its original ideas and scenes of users genuinely enjoying themselves have drawn comments and likes from around the world, and its Instagram account had more than 590,000 followers as of April 2026. Shuji Noda, managing director of Rehashine Miyakonojo Rehacare Wing and an occupational therapist, says the key to continuing is not overdoing preparation