Mt Takasaki Wild Monkey Park in Oita was flooded with complaints after announcing on Wednesday that the public had voted for a newborn macaque to be called Charlotte, just days after Britain's royal family named its newest member.
With the story making headlines around the world yesterday, the zoo offered an apology for any offence caused to the daughter of Prince William and his wife Kate.
"Initially opinions were mostly complaints saying it is disrespectful to the British people, then voices supporting the name began to increase, with some saying it was okay because the baby monkey is cute," an official in Oita, southwestern Japan, said.
As the controversy raged online, on television and in the newspapers, local officials even sought the opinion of the British embassy in Tokyo - who offered no comment - before Mayor Kiichiro Sato ended the confusion with a definitive ruling.
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Japanese society places great emphasis on not offending anybody in an effort to maintain "wa" or harmony. This frequently results in the kind of paralysis of the decision-making process - two days of debate - witnessed here.
Mt Takasaki Wild Monkey Park asks for suggestions for the name of the first macaque monkey born every year.
This year's poll, in which 853 votes were recorded, saw a sudden surge of people suggesting "Charlotte" after the British princess was named earlier this week.
But commentators on the websites of major British newspapers suggested the locals were made of sterner stuff.