Beware the bears: that's the grizzly warning from the U.S. Embassy to Americans living in Japan, after a record spate of attacks in recent months.

“Bear sightings and attacks have increased in parts of Japan, especially in municipalities close to or adjacent to populated zones,” the wildlife alert said, adding that Americans should “be aware of your surroundings.”

It added that they should “report sightings to local authorities” in Japan where been have attacked around 100 people in the country since April and killed at least 13 , according to the country's environment ministry, the highest toll in over 10 years.

A bear outside Sasama Nursery School in Hanamaki, Japan, last month.

Junko Sato / AFP via Getty Images

The attacks have taken place near populated areas, primarily in t

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