Pokémon Sleep Study Links Irregular Sleep to ¥1 Trillion ($7B) Loss

Key Facts

• The Pokémon Company and Tsukuba University’s IIIS released a joint study
• Study analyzed sleep and productivity using Pokémon Sleep data
• Over 79,000 users’ data and 2.1 million sleep sessions were included
• Users with social jetlag showed significantly lower productivity
• Japan’s annual economic loss from irregular sleep is estimated at ¥1 trillion ($7 billion)

On July 11, The Pokémon Company and the International Institute for Integrative Sleep Medicine (IIIS) at the University of Tsukuba released findings from a joint study on sleep and labor productivity. Using data from over 79,000 users of the app Pokémon Sleep, the study found that irregular sleep patterns are associated with lower productivity, leading to an estimated annual economic loss of approximately ¥1 trillion ($7 billion) in Japan.

What the Pokémon Sleep Study Revealed

The Pokémon Company, in collaboration with the University of Tsukuba’s IIIS, conducted a large-scale study using data from the mobile app Pokémon Sleep. The study focused on the relationship between sleep patterns and work productivity, analyzing the habits of 79,048 Japanese users who recorded sleep data for more than seven days. Over 2.1 million nights of sleep were analyzed in total.

The study introduced the concept of "social jetlag," which refers to the discrepancy between sleep schedules on workdays and weekends. According to the findings, users experiencing social jetlag showed significantly lower productivity compared to those with regular sleep patterns. The study estimated that individuals in this group face an annual productivity loss of ¥136,000 per person.

Classification and Impact of Sleep Patterns

The data from Pokémon Sleep allowed researchers to classify users into five distinct sleep pattern groups through cluster analysis:

Healthy Sleep: Balanced sleep indicators

Long Sleep Duration: Longer total sleep time

Frequent Nocturnal Awakenings: Interrupted sleep

Difficulty Falling Asleep with Frequent Awakenings

Social Jetlag: Late mid-sleep times and noticeable weekday-weekend differences

Among these, groups 3 and 4 showed the lowest labor productivity scores. Particularly, the social jetlag group had the poorest performance in productivity evaluations, including presenteeism scores and daytime sleepiness ratings collected via questionnaires.

Despite having adequate sleep duration, irregular sleep timing in these groups was linked to lower efficiency at work. These patterns also corresponded with higher reports of insomnia and daytime fatigue, indicating broader implications for health and workplace output.

Economic Loss and Expert Insight

Based on the correlation between irregular sleep and reduced productivity, the study estimated that Japan faces an annual economic loss of approximately ¥1 trillion ($7 billion) due to poor sleep rhythms. The calculation is based on productivity losses among individuals with inconsistent sleep patterns.

Masashi Yanagisawa, a professor of sleep science and supervisor of Pokémon Sleep, emphasized the importance of maintaining a consistent daily sleep rhythm. He noted that, beyond sleep quantity and quality, rhythm plays a key role in maximizing daytime performance.

Yanagisawa also offered a practical suggestion for improving sleep rhythm: try to maintain a consistent "mid-sleep time" even on weekends by adjusting bedtimes rather than extending sleep in the morning. He suggested that gamified tools like Pokémon Sleep can help users visualize and improve their sleep routines.

FAQ

Q: What was the focus of the Pokémon Sleep and Tsukuba University study?
A: The study focused on the relationship between sleep patterns and labor productivity.

Q: How many users were included in the study?
A: The study analyzed sleep data from 79,048 Pokémon Sleep users.

Q: What is social jetlag?
A: Social jetlag is the misalignment between weekday and weekend sleep schedules.

Q: What was the estimated annual economic loss from irregular sleep?
A: The study estimated a loss of approximately ¥1 trillion ($7 billion) per year in Japan.

Q: Which group showed the lowest productivity in the study?
A: The group with social jetlag showed the lowest productivity scores.

Source : ORICON NEWS