TOKYO - The Chinese Embassy in Japan on Wednesday warned Chinese citizens in the country against water safety hazards after a missing woman was rescued at sea near Tokyo.

A Chinese citizen was accidentally swept away by the waves while swimming at a beach in Japan, and the embassy immediately coordinated with the local police to search and rescue her.

The 21-year-old Chinese woman was rescued after drifting some 80 kilometers over about 36 hours, the local coast guard office said, adding that the woman was conscious and her condition is not life-threatening

Noting that drowning accidents spike in the summer and water-related activities carry certain risks, the embassy called on Chinese citizens in Japan to pay close attention to water safety hazards.

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According to a local coast guard office, the crew of a freighter spotted the Chinese woman in a swim ring in the sea off Chiba prefecture, east of Tokyo, shortly before 8 am local time on Wednesday.

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The 21-year-old Chinese woman was rescued after drifting some 80 kilometers over about 36 hours. She was found dehydrated but conscious, and her condition is not life-threatening, the office said.

Coast guard officials said that she went missing while swimming at Shirahama Ohama beach in Shizuoka prefecture at around 7:30 pm local time on Monday with a friend during their travel.