This article examines the practice of Sunday working in Japan, including the reasons for it, the impact on employers and employees, and relevant regulations. It explains that while Sunday working is still relatively rare compared to other countries, it is becoming more common due to changes in the labor market and increased competition from foreign companies. The article also highlights the need for companies to carefully consider their decision to employ workers on Sundays, as it can lead to decreased productivity if proper protocols are not followed or if employees become fatigued from long shifts.