The person is walking around the enclosure in a bright-coloured costume, causing the monkeys to scatter and hide.
Japanese police have arrested two American men after a costumed intruder entered the enclosure of viral internet sensation Punch the monkey.
Footage shows a person in a costume of a bright yellow smiling face wearing a suit scaling the fence of the popular enclosure at Ichikawa City Zoo before dropping into the dry moat that borders the exhibit.
The person is then seen putting the headpiece back on before walking around the enclosure, causing the monkeys to scatter and hide.
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Ichikawa Police said that the men were apprehended by zookeepers shortly after the incident unfolded.
One of the men, a 24-year-old university student, was arrested for allegedly climbing the fence and dropping into the exhibit.
Another man who identified himself as a 27-year-old singer was arrested after he allegedly filmed the ordeal.
Ichikawa Police arrested the pair on suspicion of forcible obstruction of business.
The US pair denied the allegations, and no monkeys were injured during the incident.
In a statement posted to X, Ichikawa Zoo apologised for the incident and said "no abnormalities" were observed from the monkeys in the attraction.
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https://x.com/ichikawa_zoo/status/2056298907978657931"Last night, we filed a damage report with the Ichikawa Police Station."
The zoo just outside of Tokyo became a tourist hotspot earlier this year after videos surfaced of a baby Japanese macaque named Punch.
He went viral when he was spotted hugging a stuffed Orangutan given to him by zookeepers after being rejected by his mother.
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