This article explores the sleeping habits and customs of Japanese people, as well as the effects of lack of sleep in Japan, reasons for this lack, how to improve the quality of sleep in Japan, and the benefits of sleeping more in Japan. On average, Japanese adults get 6 hours and 32 minutes of sleep per day which is significantly lower than the recommended 8 hours due to long working hours and cultural expectations. Lack of sufficient sleep can lead to serious physical and mental health issues such as obesity, diabetes, depression, heart disease, stroke and decreased productivity at work. There are several steps that can be taken by individuals or companies in order to improve the quality of sleep amongst Japanese citizens such as encouraging napping, reducing working hours, limiting technology use before bedtime and creating a relaxing environment before bedtime. Getting enough restful sleep each night has numerous benefits including improved physical health, mental health, increased productivity and better moods.