Tak●ya, a high-end department store with over 20 branches nationwide. Among them, the Min●miyama branch features dedicated women's fashion floors on the 7th and 12th levels, a popular destination for affluent women in their 30s and 40s. In the women's restroom on the 12th floor, a hidden camera was installed for approximately two months. Continuous covert filming inside the cramped stalls revealed that one out of every ten mature female users engaged in masturbation.