While your December agenda might be filled with joyful year-end parties, train station staff in Tokyo often face a more disgusting reality — vomit left behind by drunken holiday revelers at railway hubs across the capital.

According to Tokyo-based cleaning company JR East Environment Access Co., an average of 20 to 30 piles of vomit — usually the result of a wild night on the town — are found daily in and around Shinagawa Station. The average jumps to 60 on a Friday night, the firm said.

That figure doubles further at this time of year, according to the company, when numerous workers and students attend bōnenkai (year-end) drinking parties.