A rail company in Japan has apologised after one of its trains departed 20 seconds early.
Management on the Tsukuba Express line between Tokyo and the city of Tsukuba say they "sincerely apologise for the inconvenience" caused.
Many social media users reacted to the company's apology with surprise.
The mistake happened because staff had not checked the timetable, the company statement said.
"The crew did not sufficiently check the departure time and performed the departure operation," it said.
It added that no customers had complained about the early departure from Minami Nagareyama Station, which is just north of Tokyo.
The Tsukuba Express line takes passengers from Akihabara in eastern Tokyo to Tsukuba in about 45 minutes.
It is rare for trains in Japan, which has one of the world's most reliable railways, to depart at a different time to the one scheduled.
The country's Tokkaido line, which runs from Tokyo to the city of Kobe, is by far the world's busiest and carries nearly 150 million passengers a year.
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